Do you get the same issue if you run it with firefox? From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of Anthony_Baldwin@xxxxxxxxx Sent: 29 June 2009 16:14 To: thin@xxxxxxxxxxxxx Subject: [THIN] Java dialog boxes All, Having an issue with a homegrown Java applet that keeps hanging Internet Explorer on our Citrix boxes. Seems the Java applet is trying to popup a modal dialog box that somehow gets behind the IE window. We got this from looking at the threads from a process dump of a hung IE instance. The user can cause the hang pretty consistently by Alt-tabbing between seamless Citrix windows on her desktop quickly. We're running Citrix 4.0/Windows 2003/IE6 on these servers. Here's what we've tried so far... * Update the JRE configuration to disable DirectDraw support * Upgrade Citrix client to the latest version (version 11) * Disabled all IE Add-ons, except Java * Toggle the "Force offscreen compositing even under Terminal Server" setting in IE * Force the Citrix published application into windowed mode (TWIMode=off) * Cleaned out the published browser's cache * Upgraded Java on Citrix server (from 1.5.0_05 to 1.6.0_11) * Set the SeemlessFlags registry entry to 0x00027fb6 So far nothing has helped. Anyone, have any other ideas? Thanks, Tony CONFIDENTIALITY NOTICE: This message, including any attachments, is for the sole use of the intended recipient(s) and may contain confidential and privileged information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply e-mail and destroy all copies of the original message.