Strict warning: Non-static method CRM_Core_BAO_UFGroup::profileDisplay()
Can you check if you are on the latest version civi?

To fix your notice, you/a developer need to correct civicrm source code, ie. modify CRM/Core/BAO/UFGroup.php so it doesn't call statically the method, or change the method so it's a static one.

the change in itself is a one line of code, but checking what else is calling that profileDisplay method and if it's always static or some are using it "normally" needs a bit of analysis.

Once you have done that analysis and tested it locally (in a civicrm installed from git), you need to fork civicrm-core, commit your change on your repository and do a pull request

It's hopefully pretty clear in the wiki... and not as complicated as it might sound, come on IRC if you get blocked on your way:
http://wiki.civicrm.org/confluence/display/CRMDOC/Contributing+to+CiviCRM+using+GitHub