Sometimes the text is distorted and unreadable, as if the graphics were being scaled down or something. Sometimes the -/+ buttons are also distorted. Most of the other things are large enough that they're not problematic. Dragging the character sheet around makes the numbers readable, and it's not even that easy to manage to get that many numbers to go FUBAR like I did in those screenshots (and as you can see only some of the numbers in each screenshot were unreadable). I'm just concerned that something you didn't intend may be going on, like the graphics being scaled down, which may be impacting performance for some users (besides causing this glitch).
I'm using windows XP Home, 32-bit, and here's a screenshot of the entire game window: http://screencast.com/t/KriydwUB (Click the image to get the actual-size view) (this is the position the character sheet window opened at)