Hey there,
I think it has something to do with the Vera font, and maybe Windows itself. I have tried other fonts that did not look blurry.
To do this you have to a new sets of fonts (fixed and variable pitch) in your profile. But here's the thing, when I did, I found that I like the Vera font better than anything else. YMMV though.
I found already formatted sets of fonts in the Inferno distribution:
http://code.google.com/p/inferno-os/downloads/list. Copy the ones you want to try.
Then run ACME and navigate to your profile file (it should be in /usr/lib/profile). Check the lines on which the fonts are set and change them appropriately.
I will come back to this post if I find something about the blurry Vera font.