I paged a GM about this on Pacific a few weeks ago. While wandering through Felucca, I saw a blue inside a cave (north facing) in the mountain range north of Castle British. Tried to enter the cave and was blocked. Initially I thought that someone had blocked the entrance using some kind of exploit which was why I paged a GM. Of course I got the usual canned reply which told me to submit a bug report - and so I did. Still no word on that...
Then I thought that perhaps it had something to do with the messed up tiles from the snow which "hovered" in the air while Christmas was turned on. So... after the snow melted I went back (just yesterday) and lo and behold... still blocked. This isn't the case in the same cave in Trammel.
So if someone from EA/ Mythic could address this issue it would be wonderful.