Yeah, I had a few solutions to this problem about 2 weeks ago, in response to this thread:

http://zelaron.com/forum/showthread.php?t=27701



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Although, maniczone's advice is odd.

Method 1: Copy the fonts from RPGMaker to Windows\Fonts.
Method 2: Copy the fonts from RPGMaker to Windows\Fonts, then copy RPG_RT.exe.dat to the RPGMaker root.

And for some reason, copying Windows->RPGMaker works just as well as copying RPGMaker->Windows? That's even more.. odd. I assume it just forces a refresh to the game's fonts, instead of doing any real changes, but that doesn't even make sense - Why would RPGMaker check both the Windows fonts and its own internal fonts to see if either has changed, and then refresh its own? Kinda a waste of resources..

Oh well. I guess it's one of those odd things that just "happen"...