For the SocialShare plugin, you can configure the URL associated with the facebook link as:
http://www.facebook.com/share.php?u=<SHAREURL>&t=<SHARETITLE>
When I use precisely the above, it (not surprisingly) doesn't get the link right.
I think the link needs to be something like:
http://www.example.com/gallary/displayimage.php?album=$album&pid=$pid#top_display_media
where the current album and PID are filled in by environment variables, different for each picture. That's how the demo site for the plugin works at http://www.sillig.com/coppermine , I just don't know exactly how the configuration is on that site.
How would I update the configuration fro SocialShare to include the values that change with each photo?
The SocialShare plugin works for me out of the box. And the Facebook share URL is exactly the same for me. What exactly happens in your gallery?