Some bugs I've noticed:
Can't read .pda files from mod's newpdas folder;
Shadows sometimes show black and white copy of the screen instead of actual shadows (map on the screenshots is Artifact Valley by Psimorph www.doom3.ru/news.php?id=1350);
Sky looks very pixelated;
Failed saving settings to profile (rare bug, only happened once);
Vertical stripe in Classic Doom (map on the screenshots is e1m8b - Tech Gone Bad by John Romero).
Can't read .pda files from mod's newpdas folder;
Shadows sometimes show black and white copy of the screen instead of actual shadows (map on the screenshots is Artifact Valley by Psimorph www.doom3.ru/news.php?id=1350);
Sky looks very pixelated;
Failed saving settings to profile (rare bug, only happened once);
Vertical stripe in Classic Doom (map on the screenshots is e1m8b - Tech Gone Bad by John Romero).