Error - Strict Standards

We are using Ajax Register (latest version) on Joomla 3.0 and when switched to "Error Reporting" in Development mode I'm getting the following error

Strict Standards: Only variables should be assigned by reference in /home/.../plugins/system/ajaxregister/ajaxregister.php on line 72

Also We have added multiple additional fields for different user groups but no matter which user group you register to, after registeration when you go to edit your profile it show all the additional fields...how do I show only relevant fields to the usergroup they have registered to?

Your speedy response will be appreciated as these issues are delaying our go live.

Hello,

Fixed the Strict Standards notice, please download v2.7.1 and update.

Yes, I know about the profiles. The only proper solution would be to implement ACL for each field and that's planned for next versions.