Noticed on our Wikia integration, and saw that it was incorrect here: https://www.mediawiki.org/wiki/VisualEditor?veaction=edit
http://screencast.com/t/sin5AakmN0
The shortcut list shows that Command plus a number changes the heading value. This is incorrect, as it controls the browser's tabs. The correct label should be "Command".
I tested this in latest Firefox and latest Chrome.
Version: unspecified
Severity: minor
OS: Mac OS X 10.9
Platform: Macintosh