Error when using test user in Facebook C# SDK

I have setup a Facebook dev test-user for a Facebook app. When i post to the wall as the test user, I get:

The remote server returned an error: (500) Internal Server Error.

The strange thing, the post is successfull, and i cant duplicate this on a "real" account (like my personal account). It only happens with the开发者_如何转开发 test user from what i can reproduce. Another oddity, as you can see from the picture below, when looking at the Wall, it repeats my posts forever, yet if I do a Get("/me/feed"), it returns the correct number of posts and no repeats. Is this just a case of the FB test-user being flakey?

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I chalked this up to flakey FB dev account. This behavior never exibits itself on a real account.