From all your reports it looks as if the stick and/or its software (app and/or driver) is not compatible with Mountain Lion. Unfortunately, this is true for some other hardware and software as well. The only solution is to wait until the manufacturer updates its gear; eventually, some friendly "pushing" helps or at least produce a statement regarding when, if at all.
Apple : We urge a Response and Resolution for this Bug / Problem ASAP please.
Neither is it a bug in the OS, nor is Apple responsible for it. Again, please blame the 3rd-party manufacturer for it.
Also, we here are not Apple but all users trying to help each other. Apple provides the forum, but don't expect them to respond here, they might not even read.