So far from a massive sample of 4 people, it appears that rebooting the Sage before connecting to the computer keeps Windows from complaining about the dirty bit being set. It's pretty simple to add that line to the NickelMenu config file. Replace main with whatever other menus you want to see the item in.
Code:
menu_item : main : Reboot : power : reboot
menu_item : main : Shutdown : power : shutdown
No guarantees but has looked good so far.