Cog quite unstable when playing 96kHz Flac

I'm trying to play 96kHz, 16Bit Flac-files. Everything seems to work allright until I try to jump around in the song. Skipping to another song sometimes causes freeze or crash.
While playing one of the aforementioned file types, the "open file" dialog crashed (without even showing the "do you want to restart - do you want to send a report" window).
It's like "start it and don't touch it until it's finished".
Dumping the pref list, log in and log out, restarting and reinstalling didn't help. I'm using 0.06/r519.
Right now, Cog crashed upon pressing "pause".

Cheers
Heinz-Peter