Some time back I submitted a bug report; I'm not sure whether it's been dealt with. I was wandering about Apollo, a very popular sim, with a friend, and we'd managed to get separated, so I offered him a teleport. SL refused, because there were too many people on the sim--but someone teleporting from one spot on Apollo to another spot on Apollo leaves the population unchanged!
Just now, I tried to buy a Camera Control HUD which lets you put the default POV closer to your head level; judging by the reviews on the page it's highly regarded, and one certainly can't complain about the price: 0L$. I clicked buy, and was refused: "Sorry", it said, "We can't confirm your L$ balance at the moment"--but the HUD is free!