If you have recently dug Brent Spore’s post & happened to find splendidlittleblog.com, here is the ‘gist’ of what you need:
If you have noticed that Firefox has had a little bug every once in a while (i.e. you try to fill out a form online, the keyboard just won’t type anything), check this out. There are pleanty of other users having the same issue. It is a well reported bug (here, here, here, here and here) and the Firefox team is actually working on it. Since the switch and upgrade to 2.0, I have found it rather frustrating. Stop the Fox hijacking madness!
So…. try launching a new window or tab by hitting CMD+N or CMD+T, going to a page in that window or tab and then clicking back to my other window with the form in it to access the form.
This is one way to work around a hikacking Fox.