Just setup a new 2013 SharePoint...Put a handful of users in an AD group that was then put in the SP site members group. Works perfect for most people, but some are getting access denied messages to the site even though they are in the AD group. If we give the people access explicitly in the SharePoint members group they have no troubles. What am I missing?
Update: When I go to the permissions page and select Check Permissions...The people that are having trouble show a permission level of None even thought they are in the AD group!?!