Comment 1 for bug 667479

Same issue occurring on Debian testing (Wheezy), libcanberra-pulse 0.28-1 (e.g. while using iceweasel 3.6.18-1), menus take >> 5 seconds to open (on an Athlon XP).

Since it appeared to be quite difficult to gather reference information about this phenomenon, let me add these
keywords: iceweasel menu stall delay lockup timeout slow futex ETIMEDOUT mouse strace
socket(): Address family not supported by protocol
(some of those messages/keywords likely are not related, but they may occur nearby, e.g. in strace logs,
and thus are the ones that affected people will search for)

Uninstalling, restarting iceweasel makes menus work, reinstalling, restarting iceweasel makes it stall again --> clearly an issue that occurs when having libcanberra-pulse in the browser address space.

Note that on Debian here, it is NOT just root that is affected, several tested user accounts had issues.

IMNSHO this is a very annoying kind of a usability issue in a widely used variant (iceweasel) of a very frequently used application type (browser), thus it would be nice if it could get elevated (well, in case of further documented damage for many other users, that is, which would indicate higher priority).
At least the usability loss is so severe that the only way out is to simply (and, well, fatally) uninstall libcanberra-pulse and regain some tiny shreds (the bug isn't fixed yet...) of peace of mind.

Thanks, and kudos to the OP for a very detailed report!