MacBook Pro fan problems

The left side fan of my MacBook Pro suddenly developed a loud ticking noise the other evening. I phoned around and was told that there were no known issues and it was suggested by one Apple reseller that it could be due to an insect which had crawled inside. The fan has now stopped working.
A quick search confirms that others have experienced this problem. I will have to visit my local Apple store. The result of buying a "revision a" model I think - I had to exchange my original one after only two days due to a curling lid. Theres a moral here..