I searched for "RMA" and found this on another thread:
Re: Rpi quit working. Can you help me find the problem?
Post by obcd » 10 Aug 2012 16:45
If you purchased on Farnell or RS, you can fill in a webform and ask for a RMA number.
They will send you a mail with the details how to proceed.
I've no further knowledge regarding the process.
I would still say keep it, but it's your decision.
Just to say, one of the top guys (maybe Dom?) knocked that cap off by using it as a lever for removing the SD card or power plug, and he's still using it - if he can you can.
On the other hand, if you think you have power problems, one more worm escaping from the can doesn't help