Wrong font in Outlook 2002

hi, not sure if this is a win2k problem or office xp 0r Outlook specific.

suddenly (without any reason that i can determine) i have a big ugly font in several places. ‘Outlook’ headers e.g. FROM-SUBJECT-TO,
also in the options for outlook the font is so big and ugly that it does not all fit within the dialogue box. (the tabs font is normal though)
Maximised (selected) apps on the task bar display the wrong font.

i have tried windows and office ‘repairs’ but am thinking a simple registry hack is needed?

Please help it is driving me nuts.

Thanks in advance