It seems like it is a problem then. It happened again to me yesterday, so I've had no choice but to remove it for the time being. It's a real shame because I've got so used to the features, but I'm not prepared to risk a £130 investment to listen to FLAC. Today I reencoded a ton of FLAC files to ALAC and that'll have to do me for now.
I'll definitely go back to Rockbox a few versions down the line though.
Harryet, keep checking every day - you never know. The clicking on my ipod was very faint, so who knows. Even keeping the processor running requires power and if it hasn't shut down then the processor is still running.