ubuntu-us-nj Trouble w/ Ubuntu and Firefox

[Evan Koblentz]

I recently upgraded from Firefox stable release (3.6.x) to Firefox Beta 4.

The good: Firefox 4 Beta starts and is ready to use MUCH faster than 
Firefox 3 which take a while to be ready.

The bad: I had two problems.

First, I routinely use a web-based CMS, in which I edit HTML code 
displayed in a text input field.  When I upgraded to Firefox 4 Beta, 
suddenly the code didn't appear; the box was empty.  The person who runs 
the CMS told me he thinks the browser is "somehow inserting a carriage 
return / line feed."

Second, when I upgraded a second time from Beta 10 to Beta 11, my 
computer (Ubuntu 10.04) suddenly slowed to a crawl and gave me all kinds 
of error messages about problematic scripts.

Today I downgraded back to 3.6.x.  Both problems went away.

Any ideas?