Some comparison shots:
[spoiler]Software:

OpenGL:

And, yes, for the record those shots were taken in SkullTag, but found the same results nonetheless in GZDoom.
Also, reading the guidelines says to post my specs, so here they are:
OS: Windows XP Pro SP2
CPU: AMD Athlon 3200+ Socket 939 2.0GHz
Memory: 2GB
Video: ATI Radeon X850XT AGP 8x
Driver Version: 7.1
Display Resolution: 1024x768 (FYI the HUD is using a SetScreenSize() of 400x300, if this ends up not being a bug at all)