I’m using Firefox 2.0.0.1 on OS X 10.4.8. I experienced the same problem with the buttons post editor. Clearing my browser cache solved the problem for me.
Based on experience trying to deal with issues like this for the company that I work for I would suggest as a last resort trying to clear your cache. I would suggect not doing this as your first troubleshooting step because it does not reallly narrow down the problem too much.
Unfortunately, I’m relatively unfamiliar with debugging client side code in Firefox (IE only product where I work) so after trying a few things suggested here I thougth I’d see if clearing the cache helped.
For the record I had version 2.0.6, 2.0.7, 2.1 RC 1 and 2.1 RC 2 on my web for testing. I didn’t pick this up because I primarily use safari.
If there is no resolution to this soon I’d be happy to see if its a combination of previous versions pages cached in firefox on my PC that caused the problem, but I’m unable to get to this for a couple of days.
Anyway, hope this helps someone.
