http://blogs.msdn.com/tom/archive/2008/08/25/sos-best-practice-match-the-sos-version-with-the-process-being-analyzed.aspxI haven’t seen a whole of of issues around this as of yet, but now that 3.5 SP1 has released that may change.&#160; If you copy SOS.dll to another location and then load it out of that directory to troubleshoot dumps, you may start seeing problems.&#160;en-USCommunityServer 2.1 SP1 (Build: 61025.2)http://blogs.msdn.com/tom/archive/2008/08/25/sos-best-practice-match-the-sos-version-with-the-process-being-analyzed.aspx#8893667Mon, 25 Aug 2008 13:31:17 GMT91d46819-8472-40ad-a661-2c78acb4018c:8893667a-foton &raquo; SOS Best Practice: Match the SOS version with the process being analyzed<p>PingBack from <a rel="nofollow" target="_new" href="http://blog.a-foton.ru/2008/08/sos-best-practice-match-the-sos-version-with-the-process-being-analyzed/">http://blog.a-foton.ru/2008/08/sos-best-practice-match-the-sos-version-with-the-process-being-analyzed/</a></p>