I have an issue with usb printers (hp p1102w for example) disappearing from RDP sessions. The server the rdp users are connecting to is a windows server 2008 standard sp2 box. The users can login and the printers will be there and they can use them for a random amount of time and the suddenly the printer will disappear. The only resolution is to restart the server. After that is done the user can log back in and their printer will show back up. I have tried defragging the disks, running chkdsk, and I have also installed the fix it 50883.
Note: this is happening with windows xp clients as well as mac clients.
Any help would be appreciated.