Otter's Rock

I had that trouble on my lj account, but I think it had to do with a recent outbreak of trolling, because it was the troll's target and the people who friended her whose comments I suddenly started not getting. I discovered them all sitting in my Blocked Spam folder, told the folder that "These are not spam" and have had not trouble since.

Probably a wholly different problem than yours here, but certainly this had given enough to help be a test case.