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my camera is a 1.1 that OSX doesn't know what to do with - still just shows up with a black window, though.
my Dlink camera has the same problem as the initial poster - installs fine but it's a black window when in use.
same problem here with a D-Link camera. Installs fine, but video output's 320x240 black window (and the OS seems slower while it's active)....
