Change WordPress user roles and capabilities › Forums › Restrict or Permit access inside WordPress – how to › Unable to Restrict Access within WP Admin on One Specific Site › Reply To: Unable to Restrict Access within WP Admin on One Specific Site
There was one message from a client about conflict with W3 Total Cache some time ago. He planned to switch to another caching plugin.
I do not have a quick decision on hands. This issue requires the special investigation.
Did you tried to clear the cache at W3TC after updating admin menu settings in User Role Editor?