problem with user icons after 1.7 upgrade

After upgrading from 1.5 to 1.7 , and solving all ( non-upgraded ) plugis problems , i am still stuck with 1 problem, after you loged in , all members with icons turned to just 1 icon , which is your icon and profile picture with the account you logged in with, if you sign out , icons return back for each user with his own icon, logging with any account give you the same icon of this account for all users with icons, visitin any profile when you logged in als show your profile pictue as well, can anyone help me with this problem ??