Thanks for the quick reply. I don't remember which extension, but there has been one or two in the past where the support fix was still required.
This information should be explicit in the release notes. The release notes only list one item fixed and it is not the same issue (or at least is not obviously the same issue) as the one that the support fix corrected.
That means that the release notes are also not a complete version history and begs the question as to what else has changed that is not listed.