You will need to reinstall Citrix Roll Up R03, which is supposed to solve most of the known issues with SP1. I'm testing it at the moment, it breaks IE, strangely enough, each time I try to launch IE it brings up an error: "The application failed to initialize properly (0xc0000005) Click OK to terminate this application." I can then add 'iexplore.exe' to the Data Execution Prevention list and it works properly. According to the citrix article http://support.citrix.com/article/CTX106054 applying R03 will resolve this issue, but I've just uninstalled and re-installed R03 and it still doesn't work. So now i'm going to uninstall R03 and then install R02 and then R03 to see if that helps. Does anyone have any other suggestions? We are using the /PAE switch on these servers, would that have anything to do with the problem? Here's the citrix known issues paper in regards to SP1: http://support.citrix.com/article/CTX106058 Lachlan. -----Original Message----- From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of Philip Walley Sent: December 6, 2005 7:40 AM To: thin@xxxxxxxxxxxxx Subject: [THIN] Windows 2K3 SP1 and PS4 and XPe FR3 thanks to a mandate from company security, I am under a deadline to deploy sp1 to all servers including citrix. can anyone tell me what post sp1 hotfixes are going to be needed or what I can expect from this install? thanks ************************************************ For Archives, RSS, to Unsubscribe, Subscribe or set Digest or Vacation mode use the below link: //www.freelists.org/list/thin ************************************************ ************************************************ For Archives, RSS, to Unsubscribe, Subscribe or set Digest or Vacation mode use the below link: //www.freelists.org/list/thin ************************************************