Comment 12 for bug 391479

I'm using compiz 0.8.4 on Ubuntu 10.04 and I have the same problems. Update Manager steals focus, as does every other application after starting up while I'm working in another window.

I strongly second that "Personally I don't see any good reason to steal focus, ever. It is quite simply rude and annoying." (https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/373974)

As pointed out in https://bugs.launchpad.net/metacity/+bug/67476 this is security risk.