Binary package hint: seamonkey
After doing a search on E-mail folders, a list is returned.
I can select messages from that list.
However, hitting control-C does not copy the list to the clipboard, and thus I cannot use this list in other applications.
Right-clicking on the list does not yield a panel either.
I use this feature in Microsoft Outlook regularly.
This report might also apply to thunderbird (which I don't have installed)
DistroRelease: Ubuntu 9.04
Package: seamonkey 1.1.17+nobinonly-0ubuntu0.9.04.1
PATH=(custom, no user)
Uname: Linux 2.6.28-15-generic i686