Comment 19 for bug 68187

I was having this problem, and without having to reboot, I closed all instances of Firefox, restarted Amarok, and it began playing songs normally.

The first commenter who said they could reproduce it was using Firefox, and after playing a Youtube vid. Maybe this has something to do with the Firefox flash plugin.

Recently, I've also been having problems sometimes playing more than the first 2 seconds of any flash video. Maybe it's related.