Aumix doesn't work anymore

[Vladimir Nikšić]

Ever since I upgraded to gutsy, aumix doesn't work. It displays the
following message:

$ aumix
 aumix:  SOUND_MIXER_READ_DEVMASK

I have attached the strace output. I haven't seen anything suspicious in
it.

At work, I'm using Fedora 7 with the latest updates, and aumix works
normally. I have been googling around, but haven't found anything
useful. Does anyone have any ideas?