Firefox fonts bold and italic after upgrading to 3.6.x
Has the latest Firefox upgrade caused font problems? Are fonts randomly appearing in an ugly bold italic format on certain places? I recently had this problem myself and a lot of research into it suggested that upon upgrading, some of the main system fonts become corrupted. The most commonly corrupted font was arial, so your first port of call would be to replace this font with a clean version. Here’s how:

