After the upgrade to 1.35.424, the hotfix uninstall directories, e.g. C:\WINDOWS\$NtUninstallKB920213$ are left behind.
Others are complaining of all sorts of files left behind with this version too.
Seems that there are some bugs that need to be worked out in this version. Meanwhile I'd recommend people stick with the previous version unless they have a very good reason for the new version (e.g. affected by bugs which were fixed in this version).