There is a bug with picking up some travistry quest items and putting them back down. If you pick up one of the following items you will not be able to put them down, trade them, send to bank or anything other than completing the quest or calling a GM to remove them from your pack.
1. correspondence of minax
2. stolen goods quest boxes
3. assassin contracts
Also if you happen to have the dread spider silk (the really white stuff that makes the white cloth) don't pick it up. It will also get stuck in your pack.
The GM's I talked to said they know about these issues and they are working on them but for now all they can do is remove them from your pack for you.
Just some FYI for all!