[plt-scheme] Division error in DrScheme v.4.1

From: Sergey Lovtsov (gresvol at gmail.com)
Date: Wed Aug 20 10:31:58 EDT 2008

Thank you for your help!
I have fix the problem, it seems that something was wrong with 
plt-prefs.ss file. I've deleted it and, after that, DrScheme has created 
new plt-prefs.ss with default preferences. So, everything is ok now.
I don't know what caused this problem, the only thing i've changed in 
DrScheme is the font.

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