Weirdness! I don't know what's going on there, I've not fiddled with any filters or posts. Vanishing posts is somewhat disturbing. :-(
A few people on my f-list have been having problems too, and I missed a load of your posts recently because of LJ weirdness. (I can see them now, I think!)
Any post in particular? I checked my more recent ones, (but I've no way of knowing if you're seeing those, you should be!)As far as I can tell, I ain't done anything at my end.