Static Images Problem on some machines

I originally posted this in the 2D art forum, but the more I think about it, I think I've run across a bug.

On some computers, the static and animated sprites in my game load, and on some computers, they don't (works on 14 out of 15 computers). These are very small files, so I'm pretty sure that they aren't hogging memory. I can also tell you that I generated all of the my sprites through script... they are not located in the level files.

This is what I know about one computer that couldn't display the graphics:

Operating System: Windows XP Home Edition (5.1, Build 2600) Service Pack 2
Language: English (Regional Setting: English)
Processor: Intel(R) Pentium(R) 4 CPU 2.60GHz
Memory: 1278MB RAM
Page File: 417MB used, 1099MB available
Windows Dir: C:\WINDOWS
DirectX Version: DirectX 9.0c (4.09.0000.0904)
DxDiag Version: 5.03.2600.2180 32bit Unicode


Here is a screen shot of what the user is seeing. There should be a coffee machine and a grinder where the two green circles show up.

Here is a snippet from the player's log file:

//-------------------------- 6/3/2008 -- 21:30:07 -----
Processor Init:
   Intel Pentium 4, ~2.60 Ghz
     (timed at roughly 2.60 Ghz)
   FPU detected
   MMX detected
   SSE detected
 
Math Init:
   Installing Standard C extensions
   Installing Assembly extensions
   Installing FPU extensions
   Installing MMX extensions
   Installing SSE extensions
 
Input Init:
   DirectInput enabled.

Initializing chunk mappings...
   o 'TEXT' maps to TextChunk
   o 'SCHK' maps to UnknownChunk
   o 'SCHK' maps to SimChunk
Loading compiled script C:/Program Files/Yummy Drink Factory/common/main.cs.
Loading compiled script C:/Program Files/Yummy Drink Factory/game/main.cs.
 % - Initializing Common
Loading compiled script C:/Program Files/Yummy Drink Factory/common/preferences/defaultPrefs.cs.
Reading Display Device information...
   Primary Display Device Found:
      Vendor Id: VEN_0000
      Device Id: DEV_0000

Using OpenGL rendering. Fullscreen: 0

Video Init:
   Accelerated OpenGL display device detected.
   Accelerated D3D device detected.
   Voodoo 2 display device not detected.

Activating the OpenGL display device...
Setting screen mode to 800x600x32 (w)...
Creating a new window...
Acquiring a new device context...
Pixel format set:
  32 color bits, 24 depth bits, 8 stencil bits
Creating a new rendering context...
Making the new rendering context current...
OpenGL driver information:
  Vendor: Intel
  Renderer: Intel 845G
  Version: 1.4.0 - Build 4.14.10.3762
OpenGL Init: Enabled Extensions
OpenAL Driver Init:
   Vendor: Creative Labs Inc.
   Version: OpenAL 1.0
   Renderer: Software
   Extensions: EAX 2.0, EAX 3.0, EAX Unified, and EAX-AC3

Loading compiled script C:/Program Files/Yummy Drink Factory/common/gui/profiles.cs.
[bunch of additional scripts load...]