I haven't had the chance to test things extensively yet, but the last few Firefox nightly builds (currently using Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.9a1) Gecko/20060227 Firefox/1.6a1 ID:2006022704) just haven't been behaving properly.
For one, <strong> and <b> tags don't seem to be rendering at all. Let's test.
This is inside <strong> tags. This isn't.
This is inside <b> tags. This isn't.
This is a level 3 header
A quick look in IE shows things being rendered properly, but except for the H3 line, none of the strong or bold text gets rendered in this build of Firefox.
Here's a screen shot of what it looks like in IE:
But in Firefox, this is what it looks like:
Also, in text areas the cursor seems to advance a little further than it should as text is entered so that after a little bit of typing, the cursor winds up being a few character widths ahead of where characters are actually being typed.
As I said, I haven't done any extensive testing on this yet. Haven't gotten around to testing on other machines or other browsers to see if it's just this installation or this particular nightly build. A quick search of Mozilla's Bugzilla revealed this bug that was filed last July.
Perhaps I should head off and go file a couple of bug reports. Feel free to chime in and let me know what you see.
Update: Of course, now that I've gone and commented on that bug and attached some screenshots, I download and install the latest nightly (Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.9a1) Gecko/20060228 Firefox/1.6a1 ID:2006022804) and discover it seems to have fixed the bold and strong rendering issues. I suppose checking the latest nightly should have been the first thing I did.