I think it might be yahoo yeah, but there is no way to turn it off. I do not have cleartype enabled. It only shows up in yahoo messenger as far as I know. I have tried the cleartype tuner as well but it doesn't detect that cleartype is enabled.
I tried to enable cleartype, restart then disable it, but yahoo seems to still want to keep cleartype. I've almost got my new comp parts together and gonna reinstall windows after I build it. This comps going over to my gf and she'll have an LCD monitor so she prolly wont even notice.
EDIT:
Nevermind. Yahoo uses Internet explorer as a piggyback so i had to turn off Cleartype in the settings of IE. Yahoo messenger is stupid.
Thanks for the help anyway.