At some point in the last couple of months, Adobe produced a new version of Shockwave: 184.108.40.206. There may have been an announcement, but I didn’t see it.
There’s no mention of the new version on the Shockwave 12 release notes page, so it’s difficult to know what changed. It would be handy to know whether Shockwave 220.127.116.11 includes any security fixes.
So Adobe is just being lazy with version announcements, release notes, and other web-based resources. Thanks for nothing, Adobe.