All security updates require SP4 now, Extended security update support for SP3 ended in June. Here's some documents on issues with SP4 and Citrix. One deals with the problems the SP4 rollup created. These also include fixes. http://ctxex10.citrix.com/kb/entry.jspa?externalID=CTX102523 SP4 issues http://support.citrix.com/kb/entry.jspa?externalID=CTX107051 The Rollup issue ________________________________ From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of Jan Homan Sent: Friday, January 13, 2006 8:08 AM To: thin@xxxxxxxxxxxxx Subject: [THIN] MS$ security fixes for W2000 SP3 / W2000 SP4 / W2003 / W2003 SP1 It is time consuming to figure out which critical security fixes shoudl be installed in a TSE/Citrix environment. And to keep it updated. I am wondering what most people do: 1. install every security fix being released by MS$ 2. only install the most critical ones, and is so what would be the list ? 3. are there critical security fixes out there which need W2000 SP4 ? As SP4 can gives issues with Citrix XP, we are (a bit) reluctant to install SP4. Thanks. Jan NOTICE: This electronic mail transmission from the law firm of Dinsmore & Shohl may constitute an attorney-client communication that is privileged at law. It is not intended for transmission to, or receipt by, any unauthorized persons. If you have received this electronic mail transmission in error, please delete it from your system without copying it, and notify the sender by reply e-mail, so that our address record can be corrected.