First off, have to say that the new game looks amazing, good work. The new tiles are beautiful, and the custom cursors and things are a nice touch. (Though like most custom game cursors, they feel 'slower' than the standard windows cursor, and seem to operate on a small but noticeable delay, seeming to feel a few frames behind. Not sure if theres anything that can be done about that though aside from allowing the user to use the system default cursor.)
Anyway, im posting here because im having a similar issue to the thread starter in XP on an Intel Q9400 Quad core with 4 gigs of ram and a Radeon X1900. Have to agree with the other poster, that the unpredictable delay in 0.9.9.6g (sometimes its more, sometimes its less) does make playing with the keyboard very difficult, especially as you can easily get multiple moves ahead of the game display, meaning that by the time you see a problem, you've already walked multiple steps into it and cant stop.
It appears that theres a small delay after every movement animation, even on e1m1 with all enemies eliminated, perhaps removing/fixing this delay would help? Im not sure if this is for giving the AI time to move/update, or if its actually caused by slowness in the rendering, those would be my guesses though. It seems like there could be multiple ways (which will hopefully be presented as tweakable options) to fix the issue:
1: By speeding up the player movement and screen-shifting animations, or allowing the user to set how many frames of movement they want to see between each tile / allowing the them to disable it entirely.
2: By not allowing the game to queue multiple movements in graphical mode, requiring that the user wait for the animations to finish before being allowed to make another move.
Anyway, keep up the good work guys. While there are still some kinks to work out, theres no doubt about how visually polished the new release looks. As a result, i think it could easily bring in a lot of new players and supporters, and certainly hope it does.