On my XP Pro system at home I am having a very odd font problem.

All fonts on the desktop are fine. Any font in an application that doesn't have a css font applied to it is showing as italicised. I have spent several hours on Google trying to find an answer and looked through every setting in Windows, still can't figure it out. Ran a virus scan to see if that was the problem and I was clean.

I'm hoping someone here can help with this problem because it's really annoying.