Avon,
United Kingdom 
My plum tree grew long "pods" more like huge beans very early in the season before any other flowers, I have picked them off because they are going mouldy. What are they, and what should I do? Thank you.
6 Jun, 2010
Answers
Okay, come across some information - check out something called Pocket Plum disease. The description of what happens to fruits seems to fit what you're describing. Says to remove the affected fruits promptly, before they turn white, and this may or may not return next year.
10 Jun, 2010
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Not sure, but a photo would have been very useful. too late now though, I'd guess.
10 Jun, 2010