Will need to resurrect this thread ...
Carole was going to try putting the above in line 1168 at showphoto.php, but this section of the file is different in 5.14.
In Members Gallery (we have it set to show all members pics) ...
But clicking Next/Previous Image button goes on to other users pics in same category, and doesn't follow sequence of member pics / all cats by upload date.
Also this thread is maybe related, a similar problem ...
5.14: Group by Member showphoto continues to others pics
5.14 - When viewing showphoto of Category > (selecting option) > Group by Member > Photo viewing continues on to other users pics.
~ Mark