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oh wait, read through some other bug reports and it was because I had recently changed my profile to private. I switched it back and it's working again. sorry for the confusion, but I guess I'll put in another request to have it work with private profiles.
I've got Piratewalla v2.80 and iOS v4.2.1

and I completely uninstalled PirateWalla and reinstalled so there are currently 0 items in the cache.