One of the most common issues in a Terminal Services or Citrix environment tend to be printing. If I were to survey people that use either of these technologies I can almost guarantee you that’s what they’d say. The reason that printing has been such a problem is because not all printers were made to work over Terminal Services/Citrix.
IMO Citrix does a much better job with printing than just using Terminal Services, however you still won’t be error free if you aren’t careful with what you buy. Luckily their is a regularly published list of HP printers that are supported with Citrix. If you stick to the supported printers list you will be happy to see your printer woes go away. When deploying Terminal Services/Citrix in an environment one of the policies you should have is an approved list of printers that people are allowed to buy so you aren’t stuck supporting a printer that isn’t up to the task.
You can find the supported list of printers here: http://support.citrix.com/article/ctx110571