According to this post by the Microsoft XML team , MSXML 4.0 is going end of life near the end of 2007 due to security concerns in conjunction with Internet Explorer. The team recommends that all web developers using MSXML 4.0 as an ActiveX control to switch to MSXML 6.0 SP1. Note that this doesn't affect applications other than Internet Explorer but it is still advisable to switch to the newer and improved version 6.0 SP1. Share this post: email it! | bookmark it! | digg it! | reddit! | kick it...