Version: неизвестная (using 4.2.2 (KDE 4.2.2), ALT Linux i586)
OS: Linux (i686) release 2.6.27-std-def-alt16
If I try to print message in top of collapsed thread under it, "Print" menu item is disabled. This menu item is enabled for this message if I expand thread, go to next message and return to original message.
This was fixed, but I can't find the duplicate bug right now.
Should work with KDE 4.3.0.