[plt-scheme] Unreadable Error Messages

Hi,

I'm having problems with error messages in the interaction pane with 
DrScheme (version 209) on Windows XP.  If I type some garbage at the 
prompt, I get a bug icon and some completely unreadable red 'glyphs'. 
If I change the font size in preferences to something really big, I can 
make out what they are supposed to be (just about) - 'reference to 
undefined identifier', perhaps??

Is this a problem with DrScheme or my setup?  Any suggestions would be 
most welcome.

Thanks,
Tim.