If you exit Kaffeine while its in 'pause' mode, a couple of seconds of the
paused title will be played while Kaffeine quits.
Steps to Reproduce:
1. Play a playlist in Kaffeine.
2. Pause after a while.
3. Quit the program completely (not just close the kaffeine window).
Some of the paused file is played.
Kaffeine should quit quietly.
This does not seem to be Gentoo specific, you should try with the latest
kaffeine version and report a bug to kaffeine authors in case it persists.