F-list madness

betacandy brought to my attention that my posts were not appearing on her flist. I just took a moment today to spot check a couple of people I hadn't heard from in a while. I notice that superbadgirl isn't on my flist page any more. I've got a loooong f-list to check to see who else, if anyone, is missing. :(

Has anyone else had similar problems?

ETA: I'm also getting weird delays in notices of comments (made by others and by me). So, if I haven't responded, it's probably because I haven't yet gotten the e-mail notice yet.