Anybody notice this problem <http://support.microsoft.com/kb/971314>? I haven't yet. Quote: After you install the Microsoft .NET Framework 3.5 Service Pack 1 (SP1), XML Paper Specification (XPS) Essentials Pack, or any hotfix package that updates the Unidrv.dll file or other printer driver files on a computer that is running Windows XP or Windows Server 2003, all Printer Control Language (PCL) inbox printer drivers become unsigned. In this situation, all PCL inbox printer driver installations fail. I did notice this Citrix article<http://support.citrix.com/article/CTX120416>, which points to a different Microsoft article <http://support.microsoft.com/kb/961118>with a downloadable hotfix.