Cmd Up keyboard shortcut not working in Finder

Question

In the Finder, the Cmd + Up and Cmd + Down shortcuts do not work (they have no effect whatsoever).

It works properly when I create a new account.

I tried the following:

If you found something that fixed the problem, post it as a new answer, not just an edit to the question.
Agreed with @MarkSzymanski. If you figured out the problem, post your answer below in the answer box, then mark it as the accepted answer once enough time has passed to do so. I removed the answer from your question; please repost it below as a proper answer.
I could not do it because it was the first time I posted on superuser, and you have to wait 24h before posting an answer to your own question.

charlax · Answer 1 · 2011-04-21 18:18:56Z

To solve it:

1 Answer