Several of the Help links are not pointing to specific articles or are pointing to the wrong ones. I'm listing them below by tool id.
The following Help links point to to the "About Help" page rather than specific articles:
all the help links on the Overview page in the Home area:
and also Help links within individual tools/sites:
The following Help links point to the wrong articles:
sakai.resources - pointing to admin help not user help
sakai.gradebook - pointing to gradebookng content not "gradebook classic" content
sakai.search - pointing to admin help not user help