We have a Windows Server 2008 x86 print server with mostly HP printers on it. We connect the printers for the users with a login script in Group Policy.
I have found that when changing the driver for one of the printers on the print server it affects some of the other printers on the client end (for example, if one of my printers is using the Universal driver and I switch it to the driver for that specific model). After doing such a driver change we will get calls from random users saying that they can't print - always HP, but not necessarily the same model of printer. Simply removing and re-adding the printer on the client machine is not possible. We have to rip all traces of the affected printer out of the registry and then re-add it.
We had these issues on our previous print server as well, so I am assuming this is a known issue. Anyone know why this happens?