After about 2.5 months waiting for some KSC75 to be serviced under warranty from the Koss Portuguese distributor I was finally contacted (after bugging Koss) and am somewhat puzzled. They (the distributor) finally managed to get substitution drivers but, quoting, "with the shell in blue". I've never seen the KSC75 with blue shells, just the PortaPro, can it be that they're putting PortaPro drivers to fix the situation? Or are there KSC75 blue shelled drivers that I don't know of? Are the PortaPro drivers the same as the KSC75?