Heya Ghost and ShaDoOow =)
It may not be the same issue, but I've seen this on Mythos before with color text in the combat window. When my DM tool spits out a ton of information and I have to scroll to see it. The text changes colors. One of the players actually isolated what the problem was in the code. I was not closing the color tag at the end of the string. The following sample code uses a library based color function, but I think it is enough that you will get the idea.
Naughty code:
SendMessageToPC(oTarget, GetRGB(1,15,15) + GetName(oPlayer) + " really needs some chocolate, BAD!");
Corrected code with the closing tag </c> at the end of the string:
SendMessageToPC(oTarget, GetRGB(1,15,15) + GetName(oPlayer) + " really needs some chocolate, BAD!" + "</c>");
I wish this had busted before we published the final Lexicon version, I would have updated the page to include the </c> info. DOH!
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Hope that helps,
-- Mistress