CB

When userProfile is called it checks the request parameters for a user value (e.g. &user=42), but if no value is supplied the checks for it are still applied. This causes issues for Joomla 2.5 as the menu items are created with an empty &user= resulting in profile being inaccessible. CB should just ignore it if it has no value.

https://www.joomlapolis.com/forum/153-professional-member-support/236279-problems-after-upgrade-to-cb-2?start=6