Just noticed this last night, although I can't swear that it just started happening last night --
I use crtl-q to quit quite a bit. Last night it appeared as tho ctrl-q was crashing the client, although the crash reporter never appeared**. The reason I say it appeared to be crashing is because when I would log back in to last location, the initial view of me in that location, and the objects surrounding me, were old -- totally different clothing, different walls around me, etc. At some point I finally tried an actual File -> Quit, and then when I logged back in to last location, my clothes and surroundings in the initial screen were the correct ones.
#!
**Crash reporter didn't appear until quite a bit later, and wasn't really a crash (I was still in world, able to move around, manipulate objects, IM with people, etc...) -- this has already been reported in depth directly to Aaron.