I'm not sure what has happened with the latest build. Regardless of the USB device I plug in with 3186, I always get the Parallels error message for "USB device you are trying to connect is being used by another application." This applies for multiple hard drives, e-gate USB smart card readers, USB to DB9 Serial connectors. EVERYTHING. Even if I dismount a drive in OSX before trying to attach it to Parallels, I get the same message. I have absolutely no USB connectivity with the latest RTM (*cough*) release. I've tried rebooting both parallels and OSX in general, and still nothing. It seems to be an issue with Parallels tools, but i'm not positive. I was able to get USB devices after upgrading when the system first booted, and before the new version of Parallels tools was installed. Now I have nothing.