I've bumped a Windows IS from post-7.01 to post-7.03 (7.03 bundle plus the latest patches that hit selfsolve last week). Now trying to upgrade any remote Windows client fails with Operation failed with error 1638 claiming another version of the same product would already be installed. AFAIK this is a Windows Installer error code. There is one Windows host where remote upgrade succeeds: The IS itself, which already has the patches anyway.
Anyone ever seen this? Is it a bug in the latest CORE patch? Or is something else borked here?