In EK, your corpse may teleport to the base of the ramp leading to Highpass. In Befallen, near the staircase before the Level 3 door, is a rock jutting out from the wall. If players back into it or walk into it they get stuck. You must either call a GM or log out and back in and hope it unsticks you. You can also click-through when clicking on items in backpack windows.
Levitation is pretty buggy.
If you are fighting a monster on one level and the monster or is transported to another level, the monster can still attack, but you can't. This also happens if you are levitated above the monster. If you type numbers and letters together in the chat window, sometimes your numbers disappear. Use a space between them to make sure they appear. Large races such as barbarians often can get stuck in the bank at Ak'Anon.