Comment 2 for bug 346612

This has happened to me through all of the betas, in the release candidate and in the current release.
I can replicate this, and it only happens when the following happens:

- A search is made in the 'add/ remove programs' program that returns no results

- Then either deleting the search term and re-searching or changing the sources.

Whatever you do after this point will yield no results and the only way to restore functionality is to close and reopen the program.

If it is in any way relevant, the distribution that i am running has been upgraded (originally from 8.10) as opposed to being a clean install.