It worked initially for me but I got a crash about half an hour after starting it. I got the error again after running DF for a while, clicking on the console output, then clicking on the DF window. The first time when crashing, the debug window had the text "grid size 3x1/DF Accelerator (re)initialization complete" at the end of it; the second time, "grid size 1x1".
Actually, it seems I can reproduce it at will by clicking on the console window then the DF window. If I do it on the title screen, I get "grid size 1x1", a blinking title screen, then a crash when I hit a key.
I can't reproduce this crash, but from the description it sounds like your copy of DF calls glViewPort *without* then proceeding to do a complete screen update; as DFA depends on this, it would be a bit hard to fix. Basically, this makes DFA decide that the screen consists only of the 1x1 tile that was updated in that drawing cycle.
Just in case, do you use 40d?
I'm not sure how to go about fixing it, though. One possible solution would be to turn off partial-printing; could you try that, and see what happens? (I would think that would ruin any FPS gain, but it's a thing to test anyhow.)
I'm also getting the font-stretching issue that Taritus is experiencing. I'm using a 10x10 font in an 80x50 grid (800x500 window). I actually kinda like it, though -- the larger font is more readable.
The correct solution to that is to use a better font, not to use a bug to stretch it.
For the curious - DFA attempts to build a texture catalog that's as close to square as possible. That usually ends up being 740x720 or something.
When my texture coordinate generation code used the width where it should have used the height, that caused the base coordinates for the pixels to be progressively more off further into the tileset; unfortunately (perhaps), the letters that would've been a dead giveaway for this are the least affected parts. Oh well. Fixed now.
EDIT: Also, I personally prefer 16x16 fonts, at which point the effect is totally unnoticable. Never mind graphical fonts, with 2144x2112 catalogs...