Got a interesting problem....

Our printers are setup across 3 windows 2003 servers, all servers have pcounter on them. Randomly a printer will be deleted off the server. This has only started happening since we started to moved rooms over to windows 7 from CC3. All the printers that are only allocated to CC3 are not affected but as soon as a room is converted to windows 7 the printers will start to randomly disappear.

Anybody got any ideas of what could be causing this or what to look at for clues?