I recently ran across an interesting problem at a client with a server running Windows Server 2003. After installing Service Pack 1, the Printers window was completely empty. The printers were still visible from other computers over the network, but they were missing when viewed from the console. The problem ended up being that the file PRINTUI.DLL was deleted during the service pack installation. Apparently, the same problem happened at this client after installing Windows XP SP2. The solution was quite easy — just copy PrintUI.dll from another computer running the same operating system.
I haven’t run across this anywhere else, which implies that the problem is related to something specific at this client. My theory is that one of the printer drivers at this particular site is the root of the problem, and does not play nicely with Windows XP SP2 or Windows Server 2003 SP1.