Pending Credits Piling up

> Is this uncommon?

No.

It takes other users to process the same workunit to validate your result and grant credit. We still have quite a number of results being trashed by some hosts (i.e. they got them sent but never process them), so it may even take multiple times the deadline (of currently a week) before your results can be validated.

I have seen accounts with more than 30.000 credits pending.

BM