A few weeks ago I posted about some issues I’ve had with Team Build on TFS 2010 beta 2 ( http://msmvps.com/blogs/molausson/archive/2009/11/23/issue-with-team-build-2010-beta-2-on-some-localized-machines-value-cannot-be-null-parameter-name-path1.aspx ). A fix for this and a few other issues has been released and it works great on my configurations. Here’s the isses this fix resolved: Fixes an intermittent race condition that prevents WIT data from making it to the Warehouse Fixed an issue where the iteration backlog for each build workbook is based on the root iteration and not on the individual iterations Fixes an issue where in the Regional Options, the Decimal Symbol is defined to something other than “.” (For example ”,”.) Fixed an issue that prevents saving multiple work-items in excel or project when connected to TFS 2010 server from a 2008 client.