I have and Edge 500 (2.8) and when I plug it in, the computer has issues seeing it. Sometimes it works and other times it does not. This was not an issue before I upgraded the FW, but this also occurs with my nuvi.
I have the latest USB drivers installed, as well as the latest Communicator Plug in and GTC.
The USB ports are fine as other devices are recognized when I plug them in.
Any ideas would be greatly appreciated. Thanks.