Game crashes intermittently

During play, I get intermittent crashes, usually involving a starbase/fleet combat. I've pasted the debug as follows:
Debug Message: Version v1.5 last updated on: Thu Jan 11 13:39:19 2007
Debug Message: GalCiv2 is activated.
Debug Message: Checking DX Version.
Debug Message: *********DXDiag info follows.*********
System Info
Time: 5/4/2007, 18:13:50
DirectX Version: DirectX 9.0c (4.09.0000.0904)
Machine Name: HOME
Operating System: Windows XP Professional (5.1, Build 2600) Service Pack 2 (2600.xpsp_sp2_gdr.070227-2254)
Languages: English (Regional Setting: English)
System Manufacturer: INTEL_
System Model: D865GLC_
BIOS: BIOS Date: 02/02/07 11:27:03 Ver: 08.00.10
Processor: Intel(R) Pentium(R) D CPU 3.00GHz (2 CPUs)
Physical Memory: 1022MB RAM
Page File: 483MB used, 1977MB available
Windows Dir: C:\WINDOWS


Display Info
Display device 1:
Device Name: \\.\DISPLAY1
Card Name: Radeon X1950 Pro
Manufacturer: ATI Technologies Inc.
Chip Type: ATI Radeon Graphics Processor AGP (0x7280)
DAC Type: Internal DAC(400MHz)
Key Device: Enum\PCI\VEN_1002&DEV_7280&SUBSYS_E190174B&REV_9A
Display Memory: 512.0 MB
Current Display Mode: 1280 x 1024 (32 bit) (75Hz)
Monitor Name: ViewSonic VP930 Series
Monitor Max Resolution: 1280,1024
Driver Name: ati2dvag.dll
Driver Version: 6.14.0010.6683
Driver Date: 3/14/2007 20:57:34
DirectX Acceleration Enabled: Yes



Sound info
Sound device 1:
Description: SB Audigy 2 ZS Audio [B800]
Default Sound Playback: Yes
Default Voice Playback: Yes
Hardware ID: PCI\VEN_1102&DEV_0004&SUBSYS_20021102&REV_04
Manufacturer ID: 1
Product ID: 100
Driver Name: ctaud2k.sys
Provider: Creative
Driver Version: 5.12.0001.1196
Driver Date: 8/11/2006 15:45:38
Type: WDM
Other Drivers:
Acceleration Level: 3
Cap Flags: 0
Min/Max Sample Rate: 0, 0



Debug Message: *********END dxdiag info.*********
Debug Message: Entering WinMain
Debug Message: ******* Starting Game Shell *******
Debug Message: Preparing to change display settings.
Debug Message: Using multilsample setting: D3DMULTISAMPLE_6_SAMPLES
Debug Message: Game Resolution: 1280 x 1024
Debug Message: Running in windowed mode.
Debug Message: HAL (hw vp): Radeon X1950 Pro
Debug Message: D3DPRESENT_INTERVAL_IMMEDIATE
Debug Message: Refresh rate: 0
Debug Message: Bit Depth: 32 bit.
Debug Message: *********Checking D3DDevice Caps***********************
Debug Message: A full-color cursor is supported in hardware at high resolution modes.
Debug Message: Border size reported as 6 by 36
Debug Message: RGB in format 6:6:6, Masks reported as ff0000:ff00:ff
Debug Message: Now windowed.
Debug Message: Shell initialization complete
Debug Message: ***** Initializing Game *****
Debug Message: Timer Frequency is 0 b2837680
Debug Message: Initializing sound card.
Debug Message: initailizing bink
Debug Message: No string tables in E:\Program Files\Stardock\TotalGaming\GalCiv2\Mods\Default/Data/*.str
Debug Message: No files found matching mask E:\Program Files\Stardock\TotalGaming\GalCiv2\Mods\Default\Movies\*.bik
Debug Message: No files found matching mask E:\Program Files\Stardock\TotalGaming\GalCiv2\Mods\Default\Movies\techs\*.bik
Debug Message: No files found matching mask E:\Program Files\Stardock\TotalGaming\GalCiv2\Mods\Default\Gfx\*.png
Debug Message: No files found matching mask E:\Program Files\Stardock\TotalGaming\GalCiv2\Mods\Default\Gfx\Race\*.png
Debug Message: No files found matching mask E:\Program Files\Stardock\TotalGaming\GalCiv2\Mods\Default\sfx\*.wav
Debug Message: No files found matching mask E:\Program Files\Stardock\TotalGaming\GalCiv2\Mods\Default\Music\*.mp3
Debug Message: No files found matching mask E:\Program Files\Stardock\TotalGaming\GalCiv2\Mods\Default\Event Music\*.mp3
Debug Message: Create setup screens.
Debug Message: Clear galaxy settings.
Debug Message: Clear influence.
Debug Message: Clear up laws.
Debug Message: Clear first time events.
Debug Message: Clear wonders and trade goods.
Debug Message: Clear sector mapper.
Debug Message: * Collectors Edition *
Debug Message: Set mouse.
Debug Message: Set update timer.
Debug Message: No files found matching mask E:\Program Files\Stardock\TotalGaming\GalCiv2\Mods\Default\*.xml
Debug Message: No files found matching mask E:\Program Files\Stardock\TotalGaming\GalCiv2\Mods\Default\Data\*.xml
Debug Message: Clear data definitions.
Debug Message: No files found matching mask E:\Program Files\Stardock\TotalGaming\GalCiv2\Mods\Default\Data\Techs\*.xml
Debug Message: No files found matching mask E:\Program Files\Stardock\TotalGaming\GalCiv2\Mods\Default\Data\ShipComponents\*.xml
Debug Message: No files found matching mask E:\Program Files\Stardock\TotalGaming\GalCiv2\Mods\Default\Data\ShipDefs\*.xml
Debug Message: No files found matching mask E:\Program Files\Stardock\TotalGaming\GalCiv2\Mods\Default\Gfx\Planets\C0*.png
Debug Message: No files found matching mask E:\Program Files\Stardock\TotalGaming\GalCiv2\Mods\Default\Data\PlanetImprovements\*.xml
Debug Message: No files found matching mask E:\Program Files\Stardock\TotalGaming\GalCiv2\Mods\Default\Data\TerrainColorSchemes\*.xml
Debug Message: No files found matching mask E:\Program Files\Stardock\TotalGaming\GalCiv2\Mods\Default\Data\PlanetDescriptions\*.xml
Debug Message: No files found matching mask E:\Program Files\Stardock\TotalGaming\GalCiv2\Mods\Default\Data\Anomalies\*.xml
Debug Message: No files found matching mask E:\Program Files\Stardock\TotalGaming\GalCiv2\Mods\Default\Data\Events\*.xml
Debug Message: No files found matching mask E:\Program Files\Stardock\TotalGaming\GalCiv2\Mods\Default\Data\UPIssues\*.xml
Debug Message: No files found matching mask E:\Program Files\Stardock\TotalGaming\GalCiv2\Mods\Default\Data\Invasions\*.xml
Debug Message: No files found matching mask E:\Program Files\Stardock\TotalGaming\GalCiv2\Mods\Default\Data\PoliticalParties\*.xml
Debug Message: No files found matching mask E:\Program Files\Stardock\TotalGaming\GalCiv2\Mods\Default\Data\StarTypes\*.xml
Debug Message: No files found matching mask E:\Program Files\Stardock\TotalGaming\GalCiv2\Mods\Default\Data\StarbaseModules\*.xml
Debug Message: Reading Star Names
Debug Message: Reading Star Names... Done
Debug Message: Killing threads.
Debug Message: Kiling civs.
Debug Message: Killing ships.
Debug Message: Killing rallypoints.
Debug Message: Killing misc objects.
Debug Message: Killing stars.
Debug Message: Killing anomalies.
Debug Message: Killing space resources.
Debug Message: Killing colonies and planets.
Debug Message: killing scenario.
Debug Message: Clearing Turn Event Log
Debug Message: Clear galaxy settings.
Debug Message: Clear influence.
Debug Message: Clear up laws.
Debug Message: Clear first time events.
Debug Message: Clear wonders and trade goods.
Debug Message: Clear sector mapper.
Debug Message: Loading Campaign Data
Debug Message: Loading Scenario Data
Debug Message: Loading Custom Map
Debug Message: Loading Data Defs
Debug Message: Clear data definitions.
Debug Message: Loading TechDefs
Debug Message: Max num techs: 248
Debug Message: Loading ImprovementDB
Debug Message: Loading Component Defs
Debug Message: Loading ShipTypes
Debug Message: Loading ShipConfigs
Debug Message: Loading AnomalyTypes
Debug Message: Loading RandomEvents
Debug Message: Loading UPIssues
Debug Message: Loading ResourceTypes
Debug Message: Loading InvasionTactics
Debug Message: Loading SBmodules
Debug Message: Loading PoliticalParties
Debug Message: Loading Planet Types
Debug Message: Loading Star Types
Debug Message: Loading Game
Debug Message: Loading: Game mode is campaign.
Debug Message: Loading Galaxy
Debug Message: Sectors across: 3 x 3
Debug Message: Loading FOW Map
Debug Message: Loading ZOC Map
Debug Message: Loading Planets
Debug Message: Loading Stars
Debug Message: Loading Anomalies
Debug Message: Loading Resources
Debug Message: Loading Civs
Debug Message: Loading Colonies
Debug Message: Loading RallyPoints
Debug Message: Loading Ships
Debug Message: Loading Fleets
Debug Message: Can't find ship type Fleet in definitions
Debug Message: Can't find ship type Fleet in definitions
Debug Message: Can't find ship type Fleet in definitions
Debug Message: Loading Turn Event Log
Debug Message: Loading ENDGALAXYDATA
Debug Message: Updating ZOC.
Debug Message: UIBeginGame called with g_ulLocalPlayerID = 0
Debug Message: UIBeginGameHelper: New Campaign Game Started: Dread Lords Campaign
Debug Message: UIBeginGameHelper: Mods are Enabled
Debug Message: Random Event: Begin
Debug Message: Random Event: End
Debug Message: Saving game D:\Documents and Settings\Brian\My Documents\My Games\GalCiv2\Dread Lords Campaign\QuickSave.sav
Debug Message: Num Sectors Across: 3
Debug Message: No files found matching mask E:\Program Files\Stardock\TotalGaming\GalCiv2\Mods\Default\Data\ShipCfg\*.shipcfg
Debug Message: Saving: Game mode is campaign.
Debug Message: Save game finished.
Debug Message: Random Event: Begin
Debug Message: Random Event: End
Debug Message: Drengin Empire (1): Researching: Phasors V
Debug Message: Random Event: Begin
Debug Message: Random Event: End
Debug Message: Random Event: Begin
Debug Message: Random Event: End
Debug Message: A* Path too long to calculate (27.730848). Aborting
Debug Message: Random Event: Begin
Debug Message: Random Event: End
Debug Message: Saving game D:\Documents and Settings\Brian\My Documents\My Games\GalCiv2\Dread Lords Campaign\QuickSave.sav
Debug Message: Num Sectors Across: 3
Debug Message: No files found matching mask E:\Program Files\Stardock\TotalGaming\GalCiv2\Mods\Default\Data\ShipCfg\*.shipcfg
Debug Message: Saving: Game mode is campaign.
Debug Message: Save game finished.
Debug Message: Random Event: Begin
Debug Message: Random Event: End
Debug Message: Random Event: Begin
Debug Message: Random Event: End
Debug Message: Random Event: Begin
Debug Message: Random Event: End
Debug Message: DomesticWnd: Cannot find OBJID Domestic_Government_Tab
Debug Message: DomesticWnd: Cannot find OBJID Domestic_Governor_Tab
Debug Message: DomesticWnd: Cannot find OBJID Domestic_Stats_Tab
Debug Message: DomesticWnd: Cannot find OBJID Domestic_Graphs_Tab
Debug Message: EconomicWnd: Cannot find OBJID Template_Button_Back
Debug Message: A* Path too long to calculate (5.099020). Aborting
Debug Message: Random Event: Begin
Debug Message: Random Event: End
Debug Message: Destroying ship Drengin Heavy Fighter M4-10 310. Orbiting: 0
Debug Message: Destroying ship Drengin Heavy Fighter M4-10 310. Orbiting: 0
Debug Message: Saving game D:\Documents and Settings\Brian\My Documents\My Games\GalCiv2\Dread Lords Campaign\QuickSave.sav
Debug Message: Num Sectors Across: 3
Debug Message: No files found matching mask E:\Program Files\Stardock\TotalGaming\GalCiv2\Mods\Default\Data\ShipCfg\*.shipcfg
Debug Message: Saving: Game mode is campaign.
Debug Message: Save game finished.
Debug Message: Random Event: Begin
Debug Message: Random Event: End
Debug Message: A* Path too long to calculate (5.099020). Aborting
Debug Message: Random Event: Begin
Debug Message: Random Event: End
Debug Message: Destroying ship Drengin Heavy Fighter M4-10 312. Orbiting: 0
Debug Message: Destroying ship Drengin Heavy Fighter M4-10 312. Orbiting: 0
Debug Message: Saving game D:\Documents and Settings\Brian\My Documents\My Games\GalCiv2\Dread Lords Campaign\QuickSave.sav
Debug Message: Num Sectors Across: 3
Debug Message: No files found matching mask E:\Program Files\Stardock\TotalGaming\GalCiv2\Mods\Default\Data\ShipCfg\*.shipcfg
Debug Message: Saving: Game mode is campaign.
Debug Message: Save game finished.
Debug Message: Random Event: Begin
Debug Message: Random Event: End
Debug Message: Yearly Status Dialog
Debug Message: Yearly Status Dialog 6
Debug Message: Yearly Status Dialog 6b
Debug Message: Saving game D:\Documents and Settings\Brian\My Documents\My Games\GalCiv2\Dread Lords Campaign\AutoSave.sav
Debug Message: Num Sectors Across: 3
Debug Message: No files found matching mask E:\Program Files\Stardock\TotalGaming\GalCiv2\Mods\Default\Data\ShipCfg\*.shipcfg
Debug Message: Saving: Game mode is campaign.
Debug Message: Save game finished.
Debug Message: Altarian Republic (2): Researching: Phasors II
Debug Message: Random Event: Begin
Debug Message: Random Event: End
Debug Message: Destroying ship Altarian Heavy Fighter M4-4 271. Orbiting: 0
Debug Message: Destroying ship Altarian Fleet 79. Orbiting: 0
Debug Message: Destroying ship Drengin Heavy Fighter M4-5 273. Orbiting: 1
Debug Message: Was Orbiting: Kith
Debug Message: Destroying ship Drengin Troop Transport M4-4 306. Orbiting: 1
Debug Message: Was Orbiting: Kith
Debug Message: Random Event: Begin
Debug Message: Random Event: End
Debug Message: Destroying ship Drengin Heavy Fighter M4-10 318. Orbiting: 0
Debug Message: Destroying ship Drengin Heavy Fighter M4-10 318. Orbiting: 0
Debug Message: Saving game D:\Documents and Settings\Brian\My Documents\My Games\GalCiv2\Dread Lords Campaign\QuickSave.sav
Debug Message: Num Sectors Across: 3
Debug Message: No files found matching mask E:\Program Files\Stardock\TotalGaming\GalCiv2\Mods\Default\Data\ShipCfg\*.shipcfg
Debug Message: Saving: Game mode is campaign.
Debug Message: Save game finished.
Debug Message: Destroying ship Altarian Heavy Fighter M4-10 308. Orbiting: 0
Debug Message: Random Event: Begin
Debug Message: Random Event: End
Debug Message: Random Event: Begin
Debug Message: Random Event: End
Debug Message: Random Event: Begin
Debug Message: Random Event: End
Debug Message: Random Event: Begin
Debug Message: Random Event: End
Debug Message: Destroying ship Defender III 207. Orbiting: 0
Debug Message: Destroying ship Drengin Heavy Fighter M4-10 321. Orbiting: 0
Debug Message: Destroying ship Drengin Heavy Fighter M4-10 321. Orbiting: 0
Debug Message: Random Event: Begin
Debug Message: Random Event: End
Debug Message: Destroying ship Altarian Defender M2-4 165. Orbiting: 0
Debug Message: Destroying ship Altarian Defender M1-10 68. Orbiting: 0
Debug Message: Destroying ship Altarian Fleet 69. Orbiting: 0
Debug Message: Random Event: Begin
Debug Message: Random Event: End
Debug Message: Destroying ship Drengin Defender M4-5 269. Orbiting: 1
Debug Message: Was Orbiting: Datha
Debug Message: Destroying ship Drengin Troop Transport M4-4 276. Orbiting: 1
Debug Message: Was Orbiting: Datha
Debug Message: Destroying ship Drengin Troop Transport M4-4 305. Orbiting: 1
Debug Message: Was Orbiting: Datha
Debug Message: Random Event: Begin
Debug Message: Random Event: End
ASSERT ERROR in file .\Source\EndTurn.cpp at line 1989.
Debug Message: Destroying ship 2-Heavy Fighter M5-1X 5. Orbiting: 0
Debug Message: ERROR: Had to force clean up on dead ships that were lingering! (Ship Name: 2-Heavy Fighter M5-1X 5)
Debug Message: Destroying ship 2-Heavy Fighter M5-1X 5. Orbiting: 0
Debug Message: Destroying ship Altarian Fleet 82. Orbiting: 0
Debug Message: Random Event: Begin
Debug Message: Random Event: End
Debug Message: Cannot find texture
Debug Message: Cannot find texture
Debug Message: Cannot find texture
Debug Message: Cannot find texture
Debug Message: Random Event: Begin
Debug Message: Random Event: End
Debug Message: Random Event: Begin
Debug Message: Random Event: End
Debug Message: Yearly Status Dialog
Debug Message: Yearly Status Dialog 8d
Debug Message: Saving game D:\Documents and Settings\Brian\My Documents\My Games\GalCiv2\Dread Lords Campaign\AutoSave.sav
Debug Message: Num Sectors Across: 3
Debug Message: No files found matching mask E:\Program Files\Stardock\TotalGaming\GalCiv2\Mods\Default\Data\ShipCfg\*.shipcfg
Debug Message: Saving: Game mode is campaign.
Debug Message: Save game finished.