I had the same problem: with help from Jason, the solution is:
edit line 246 of the manage_users.php page:
Original PHP Code:
<td><?php if($totalRows_contents > 0 ) {
change to:
PHP Code:
<td><?php if($totalRows_cmscontents > 0 ) {
Hope this helps.
If Im correct, this has been fixed in the new build version (beta).