[BUG] regulus movement animation

I've noticed this occuring several times with Regulus. At various points in a game, for a brief period, ai regulus' will not show the movement animation as they move around - instead, the animation will be stuck in the standing still position, but will teleport very short distances to keep up with the actual location of the regulus (kind of like the bug with the scout in tf2).

dxdiag:

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System Information
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Time of this report: 9/8/2008, 15:53:02
       Machine name: VERSPUNKEN
   Operating System: Windows XP Professional (5.1, Build 2600) Service Pack 2 (2600.xpsp_sp2_gdr.070227-2254)
           Language: English (Regional Setting: English)
System Manufacturer: System manufacturer
       System Model: System Product Name
               BIOS: Phoenix - AwardBIOS v6.00PG
          Processor: Intel(R) Core(TM)2 CPU          6600  @ 2.40GHz (2 CPUs)
             Memory: 2046MB RAM
          Page File: 1068MB used, 2870MB available
        Windows Dir: C:\WINDOWS
    DirectX Version: DirectX 9.0c (4.09.0000.0904)
DX Setup Parameters: Not found
     DxDiag Version: 5.03.2600.2180 32bit Unicode

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DxDiag Notes
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  DirectX Files Tab: No problems found.
      Display Tab 1: No problems found.
        Sound Tab 1: No problems found.
          Music Tab: No problems found.
          Input Tab: No problems found.
        Network Tab: No problems found.

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DirectX Debug Levels
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Direct3D:    0/4 (n/a)
DirectDraw:  0/4 (retail)
DirectInput: 0/5 (n/a)
DirectMusic: 0/5 (n/a)
DirectPlay:  0/9 (retail)
DirectSound: 0/5 (retail)
DirectShow:  0/6 (retail)

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Display Devices
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        Card name: NVIDIA GeForce 8800 GT
     Manufacturer: NVIDIA
        Chip type: GeForce 8800 GT
         DAC type: Integrated RAMDAC
       Device Key: Enum\PCI\VEN_10DE&DEV_0611&SUBSYS_23301682&REV_A2
   Display Memory: 512.0 MB
     Current Mode: 1680 x 1050 (32 bit) (60Hz)
          Monitor: Plug and Play Monitor
  Monitor Max Res: 1600,1200
      Driver Name: nv4_disp.dll
   Driver Version: 6.14.0011.7519 (English)
      DDI Version: 9 (or higher)
Driver Attributes: Final Retail
 Driver Date/Size: 5/16/2008 14:01:00, 6108928 bytes
      WHQL Logo'd: Yes
  WHQL Date Stamp: n/a
              VDD: n/a
         Mini VDD: nv4_mini.sys
    Mini VDD Date: 5/16/2008 14:01:00, 6557408 bytes
Device Identifier: {D7B71E3E-4551-11CF-6D68-3B0303C2CB35}
        Vendor ID: 0x10DE
        Device ID: 0x0611
        SubSys ID: 0x23301682
      Revision ID: 0x00A2