Mplayer needs gdbm 1.8.3 for Matroska video playback. (Bug #165)
Mplayer depends on gdbm 1.8.3 specifically libgdbm.so.3 for Matroska video playback. It does not currently have this decency and even if it did the current version of gdbm in the master branch is 1.9.1. Probably need to keep a 1.8.3 package around since I don't think the two version conflict.