This was fixed, in a particularly heavyhanded way, by abolishing the navigation pane altogether. The demons causing this bug escaped into bug 846138, but now seem to be vanquished.
** Changed in: software-center (Ubuntu) Status: New => Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/624317 Title: Alert sound plays when expanding/collapsing navigation pane items with keyboard To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/software-center/+bug/624317/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs