I should not have to reboot my phone to get my PC to recognize the SD card media in USB storage mode.
My DroidX rebooted every time I connected to USB. There is reason to believe that an app on SD is not yielding to the dismount request, and rebooting is Android's last resort to getting the app to yield, so that it can mount the SD card in USB mode.
I've moved all my apps back to the phone.
Sent from my unrooted DroidX using DroidForums app.