http://blogs.technet.com/b/gbordier/archive/2008/11/03/exchange-2007-ru4-quick-update.aspxQuick update from my previous post about rollups. RU4 still has the same CRL check behavior and the script I published has been rolled out nicely at several customers. So even though it is obviously not supported  by Microsoft in any way, you mayen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)