1. Sometimes VLC refuse to start when starting knots2 (knots informs about this in the terminal). What I do then is to stop knots2 and retry, and then usually it starts again.
2. Sometimes knots2 cannot be stopped with CTRL+C, it just refuse to die. I have to kill the process using kill <pid>.
3. Not too seldomly it appears to end up in a state where the song appears to be playing but no sound actually comes out. Solution is to restart knots2 a couple of times.
4. The is no log out option in knots2, therefore it's difficult to switch user. Sometimes it also accumulates users at the status tab, even if I'm at the very same browser session.
5. Fetching covers may fail without obvious reason. I overcame this by increasing some hard loop limit in the code where the covers are fetched (don't remember where I did that, but it helped when having lot of music).
6. I'm used to a normal 'pause' button...there is none.
7. Regardless if the current tune has completed or is currently playing (and after having used the 'hide' button), I have to go back to the tune I played and press the blue 'stop' button, otherwise I won't be able to start another song.
8. The player plugin doesn't seem to work in IE at all (it's not fully sized and no song plays even if bar is moving). Doesn't matter to me though since I'm not using IE.