There is no Slackware official package for Kaffeine. The build script in http://slackbuilds.org/repository/12.2/multimedia/kaffeine/ has no non-trival patch, but I don't know if it is the script Darrell used.
Pretty much the same script, although I use a snippet from the slacky.eu script. Yet as you said, there are no known non-trivial patches that could cause this behavior. The cause has to be something in the TDE sources, in modified TDE header files, or in the video detection scheme embedded somewhere in TDE Kaffeine.
The OSD bug does not cause a crash or anything serious, but the flourescent green is hard on my eyes. Very geeky looking too. :(
Darrell