This just happened recently when my Scrobbler attempted to scrobble down plays from my iPod, but next thing you know, the program now starts freezing up and doesn't even scrobble to my profile anymore.
For some reason, it does show the song that's being played, but it keeps freezing on and off when I try to access the program.
I'm going to try to delete and reinstall the program to see if it fixes it.
EDIT: Well, it seemed to work, but for some odd reason, when I tried to reinstall it the first time, the installation froze! But when I tried again, it went through and everything seems to be working fine.
Scrobbler keeps freezing/doesn't scrobble songs