[Bug 192797] [NEW] Changing themes with Firefox open makes it temporarily use 100% CPU

[Tristan Schmelcher]

Public bug reported:

Binary package hint: firefox

Just like the title says.

I have an up-to-date i686 gutsy install on a Dell XPS M1710 laptop (with
some packages installed from hardy though, but none related to this). If
I have Firefox open and I change themes in
System->Preference->Appearance->Theme, Firefox becomes unresponsive and
uses 100% CPU for about 20 seconds or so, after which it recovers. This
is a very long time to be unresponsive. Many users will kill it before
that. And changing themes can't possibly require useful work that would
need 100% CPU for 20 seconds.

$ cat /etc/lsb-release 
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=7.10
DISTRIB_CODENAME=gutsy
DISTRIB_DESCRIPTION="Ubuntu 7.10"
$ apt-show-versions firefox
firefox/gutsy uptodate 2.0.0.12+2nobinonly+2-0ubuntu0.7.10

** Affects: firefox (Ubuntu)
     Importance: Undecided
         Status: New

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Changing themes with Firefox open makes it temporarily use 100% CPU
https://bugs.launchpad.net/bugs/192797
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