Not everytime, but more times, when I try to shutdown Windows (XP Pro SP2)
it can't unload apdproxy.exe (the camera icon in the tray bar) and comes with the typical message window trying to close without success a program named "CardReaderLookupWindow".
I've dont found this program but it seems related to apdproxy.exe because if you manually close the camera icon in the tray bar, windows shut down immediatly and normally.
I've had this problem in diferent PC's and diferent configurations.
I confirm it seems an Adobe (apdproxy.exe ) problem because this same problem happen when an USB key is mounted as removable drive.
Seems apdproxy.exe freezes on shutdown if any removable media is present at this time.