If this is a only limited to seamless sessions, this is a good starting point Seamless Configuration Settings: http://support.citrix.com/article/CTX101644&searchID=40230393 -PB From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of Jason Patten Sent: Friday, March 09, 2007 11:45 AM To: thin Subject: [THIN] application lock up I know this one is a tough one to diagnose, but I have a client who whenever our application opens any kind of secondary window her session locks up. As far as I can tell, the pop-ups are either being blocked or popping in behind the main window and taking the focus with them. I have updated to version 10 of the web client. The application is seamless, but i understand the issue occurs whether in seamless or windowed mode, but I need to confirm --Jason