In Joomla 1.5 you can select a default list size of 100. In VM however, this causes a minor issue with navigation as VM can only use 50 as the largest setting. Navigation in VM usually switches to 5 on the next page when I press 'next' or a number in the list.
Reproducing is easy, just select 100 as default in joomla, then try the admin button in the VM module (that does not redirect you to the Joomla admin interface).