Comment 5 for bug 992717

Hi Péter, there is no mention of a warning/error in the bug I linked to (bug #1002710) or in its duplicates (bug #1003820 and bug #1013386). Opening files from the Dash fails silently, so your bug might be the same.

If you sometimes get a warning/error when you try to open files from the Dash, that might indicate another bug, or that the file you're trying to open has been moved/renamed/deleted.

You can try to reproduce your bug in Unity 2D by creating "test/somefile1.txt" and "tést/somefile2.txt" and try to open them from the Dash. You won't be able to use Unity 2D anymore if you've upgraded to Ubuntu 12.10 though.