I have recently performed a fresh install of Ubuntu Studio 14.04. I have 2 users setup to gain access to the system. The problem - i know it is not so much of a critical problem.. only aesthetic - is that at log in the users have a profile picture that cannot be changed - it currently shows the same default gray image for both users....
a side note is that before i performed a clean install i had initially performed an update from 11.10 to 14.04 and the log in pictures were carried over from the previous installation... for my own reasons i decided to wipe and reformat the whole drive and perform a clean install. It now only shows the same default gray picture for both users and I am unable to find anywhere in the settings to change/update it.
-cheers!