This will cause an error message in Fusion after publishing a site using a menu originally created in a previous build that has been updated in 842.
To clear the error, go to Site View and re-optimize your site after recompiling your menu with 842.
This will clear the obsolete files from the Fusion .nod file database.
The two files are: awmlib3.js and awmlib5.js.
These two files should be removed from the web server as well.