Comment 1681 for bug 1

Since Unity is the default Desktop environment Ubuntu has becon VERY unstable. I've upgraded two machines to Ubuntu 12.04: both are unusable now! LTS is LTI now: Long Term Instability ...

For every 10.04 LTS user I'd recommend NOT to upgrade but to switch the Distribution.
I like the idea behind Unity but it's instability is the horror. Every upgrade to the next Ubuntu release since 11.04 was a pain!

As long as Unity won't be rock solid stable, Ubuntu will never gain a appropriate Market share. I used to recommend Ubuntu but now: No way! I'd rcommend Mint or Fedora or an alternative like xubuntu or kubuntu.

Comment #1680 is right with: "To conclude, Ubuntu is (imho) still the best linux for desktop, but with growing number of features etc, it's getting less and less stable, and without admitting that I doubt that this bug would ever be fixed.", except that Ubuntu is still the best linux for desktop. It used to be, but since 11.04 it's going down the drain.

Go and get Unity stable and stop this featuritis. Become the Ubuntu that it used to be, then you might have a chance.