Having issue while saving. Photoshop CS5 on new iMac, Snow Leopard OS X. If, while saving (mouse icon wheel is spinning) to a network drive, I CMD+Tab to another program, when I return to PS, the document finishes saving and then jumps back some number of states in the document history. A quick CMD+Z undoes the state change. Reproduceable almost every time. Not sure if the doc is jumping back to previously saved state, or some random number of states.