Death of a squid?

Hi All: I was messing about with squid last night and trying some different options in the conf file and kept starting and restarting the daemon. I think the machine had enough in the end as it refused to start and I got messages in the X Console saying that squid had been switched off due to excessive failures. I re-started the machine a few times but it made no difference. I left it overnight on the naieve and misguided (?) belief that it would settle and come back to normal. I'm just on my way to school now to see if it worked. If it didn't, any suggestions as to how I can get it running again? Is it some sort of re-compile? Paul