Feb 11, 2008 12:07 PM|Mikhail Arkhipov (MSFT)|LINK
Most probably the issue is unrelated since a) hotfix does not change anything related to templates or IDE code and b) there are reports about sudden template disappearance without the hotfix. Try running
devenv /installvstemplates from command line. You can also try uninstalling the hotfix and see if it makes a difference.