windows displaying too large fonts

[stillpixels]

I backed up my fonts folder and ended up somehow moving the fonts, instead of just copying them. I reinstalled everything, but ever since many windows/popups and some program menus have been displaying with extra large fonts, some of them too big to read, with the windows extending off the screen.

See screenshot for an example - http://13th-hour.net/img/stuffed.gif

any ideas how to fix this? many thanks