does it work better if you clear out all those files and start with a fresh install of Arduino?
I don't think anyone will claim that the arduino font and color choices are the most wonderful of all possible, but it should be better than "completely blank" and "unreadable."
I haven't got WinXP any more so I can't try this out but is the info in this link any help?http://www.gnostice.com/nl_article.asp?id=189&t=Is_ClearType_Enabled_On_Your_Windows_XP_DesktopPete
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