At 2:26pm -0400 Sat, 22 May 2010, Syed Fahd wrote:

Has anybody else had FIrefox (or other builds of it) crash when
1 tab is closed in Lucid? This didn't occur in Karmic.

If it crashes, you've found a bug in Firefox.  No matter who's fault it is, Firefox is crashing, so, by definition, Firefox has the bug.

Is it 100% recreateable?  With a simple test case?  If so, you may be able to find a report on launchpad about it, likely with some pointers about how to workaround the issue.  If not, create one!

What version of Ubuntu are you running?  32 bit or 64 bit?  I ask because I can attribute most of my Firefox crashes to Flash not playing nice in a 64-bit environment.

Finally, though it doesn't answer your question, you might want to take a look at chromium-browser in the repos.  (It's the open-source project behind Google's Chrome.)  I just started using it two weeks ago and am very impressed.  It is *fast*, and, because each tab is its own process, I haven't experienced any of that multi-second lag that plagues Firefox.  Also, thanks to each tab contained in its own sandbox, when Flash flakes out, I lose just that tab.  No others.  Of course, the downside is that the plugins aren't nearly as complete as Firefox's.

So, to actually answer your question: No. I haven't experienced any more crashing than was normal for Karmic.

Kevin