Thanks for the tip, Jeff. I enjoy PhotoshopNews and check it regularly. Somehow that fine point about PS, Bridge and ACR relationships just didn't register.
But really, if a user opens PS, clicks on Bridge from within PS, then opens ACR within Bridge, then closes ACR via "Done", I suspect that nearly everyone would expect to return to Bridge for another browse, selection, etc. As is, the result of the above workflow appears to be a return to PS -- which has no images loaded. (I do see that the Bridge window is open behind the PS window and not minimized.)
Oh well, it's just one more click but I'll bet that I'm not the only one who'd like to avoid it.
Although the above workflow seems natural to me, perhaps it is a poor one. Although not a professional photographer, I do use PS very regularly. What sequence do others use to browse through their RAW files, adjust in ACR and then edit in PS?