This has been bugging me for a while, it wasn't like this before, but the user's name on the winner screen is off-centered. I know it's not an important issue, but I'd like it fixed anyways so it looks nicer. How do I fix it?

Here is a screenshot of one:
http://i630.photobucket.com/albums/uu26/phoqueue/Miscellaneous/iSketchWinner.jpg

Hi there phoqueue and welcome to the forum :)

I don't think it is possible for you or anyone to change their settings on their computer to centre the winner's rotating name. Except for the occasional iSketch admin roaming this forum, iSketchforum is not officially affiliated with iSketch itself, so no-one here can fix the problem directly from your post. You could always send an e-mail to Feedback (info@isketch.net) requesting that they fix it, but as you said yourself, it is a relatively unimportant issue as you can always see the winning name(s) in the Users box.

Just as an aside, when the winning name(s) include(s) an underscore, the winning names to the following games do not display at all.

If the off centred-ness bothers you that much just turn the end of games celebrations off. It's in the settings somewhere. That's what I do. Besides, many people in the past have complained about the EoGC freezing the game and ruining the game for some reason. Happened to me a few times too so it kinda helps.