Attempting to use cultural container puts character in a bugged state
 

This just occurred while attempting to use the Feir`Dal forge in Kelethin as an incompatible race. After clicking Combine on the forge I got the message, "Your race cannot do tradeskills in this container." After that I couldn't interact with the forge - clicking on the items I had in the forge no longer worked, but was able to close it with my items still inside and they were returned to my inventory. Then I couldn't use any UI hotkeys or shortcut commands - it would just say, "You can't use that command right now...", and also couldn't interact with anything in the game such as vendors, doors, switches, etc. Was able to type /q to shut down the client. Should be pretty easy to reproduce.

same happens if you try to pickup items on the ground sometimes, bugs the chars out and mouse clicking doesn't work anymore, You just get a msg You can't use that command right now..." however you can still type command, like sit, camp, to reload char and fix it.
think it's due to server having recorded that something isn't there anymore but client shows it as being there or something, desyncs you.

Not to hijack this bug thread, but yes, this happens very often with any in-game ground spawns. Double-clicking seems to set it off.

Two examples that come to mind: Sack of Hay (West Karana) & Pouch of Frozen Roots (Iceclad)