Version: (using Devel) Installed from: Compiled sources It isn't possible to unselect mails using the keyboard (shift and up/down arrows), you can just select them. I use rev. 890848.
Already reported as bug #176677
Sorry for the duplicate report. (BTW, you can explicitly mark a bug as a duplicate of another one. ) *** This bug has been marked as a duplicate of bug 176677 ***
We usually use invalid when a report was reported twice (and use duplicate for real ones).