This started in FF4 but I still have this issue after upgrading to FF5. On some sites characters are missing from text (but it's the same issue on several different sites, so I don't necessarily think it's something wrong with these sites, seems more like a font issue). The missing characters I noticed are åäö, the hidden password character (circle) and ' (quote). Win7x64 is my machine and it works fine in IE9. I've tested my fonts in other applications and I can see these characters in the Arial/Helvetica font just fine. [http://www.screencatch.com/view.php?i=13100647569375 Example of missing characters] URL of one of the sites: [http://goo.gl/wRXmq Swedish characters missing]