Evolution mail based keyboard shortcuts stop working after a while. This seems to happen more often when using IMAP than local stores, but it also happens with them. Things like CTL-D, for instance stop working. Also the message related toolbar icons stay grayed out, even when they shouldn't be.
I have found a fix for the bug. bonobo needs to be upgraded to 1.0.19. I have an ebuild I will post. I've also upgrade oad and ORBit as well. I'll post them soon after reviewing the ebuild guidelines.