Please describe the problem:
I have an up-to-date Ubuntu Gutsy i686 installation with Rhythmbox 0.11.5 installed from Ubuntu Hardy. (But this bug also occurs on 0.11.2, the Ubuntu Gutsy version.) This bug is open with Ubuntu at https://bugs.launchpad.net/ubuntu/+source/rhythmbox/+bug/164586 but I have been requested to move it upstream. Note that in the past I also saw this bug on Debian.

In Rhythmbox, when choosing Import Folder, the Gnome open folder dialog will open in the last folder that was opened (as expected). For certain folders, if the user clicks Open immediately (i.e., that folder is already the one that the user wants to import), then nothing happens. The dialog does not close and there is no error message. In order to open the folder, the user must navigate to a different folder, navigate back, and then click Open. For me, this happens with "~/Untagged Music", but not with ~/Music, ~/Desktop, or ~/. As a test, it also happens for me with "~/Folder with Spaces", but also "~/FolderWithoutSpaces", and "~/Folderwithoutcapitals", so I don't know what the pattern is. For the folders with which this occurs, it is 100% reproducible.

Since Rhythmbox doesn't track additions to imported folders, users may frequently be re-importing the same folder, so particular users may see this bug a lot.

Steps to reproduce:
Try the following steps with a variety of different folders (recommended to try creating the ones I named above).

1) Open rhythmbox.
2) Choose File -> Import Folder. Navigate to a folder of your choice and click Open.
3) Choose File -> Import Folder again. (The dialog begins in the same folder that you opened in (2).)
4) Click Open without navigating anywhere.

Actual results:
Eventually, you should find a folder for which step (4) consistently does nothing. That is, the Import Folder dialog remains open and there is no error message.

Expected results:
The dialog should close and the folder should be imported.

Does this happen every time?
Yes, but it only occurs for certain folders.

Other information:
Workaround: Navigate to a different folder, navigate back, and click Open.