This is an update for all of you that, like me, have had problems with images not showing in your galleries.
I had this problem and submitted a enquiry to the support team at Prophoto recently.
First I must mention that this is a fix for Prophoto4 blogs and cannot account for any other themes in WordPress.
I must also mention that I am not a developer so please don’t ask me any questions as I won’t be able to help 🙂
This is their response, which worked great (for me):
Reload Prophoto
In your WordPress admin area, go to “ProPhoto” > “Customize” > “Advanced” > “Custom Code” and paste this code into the “Custom CSS” area, then click save:
.ims-colorbox img {width: auto; height: auto;}
I hope this fixes your problem, If you are like me then you love the imagestore plugin but have been frustrated by this issue.
All the best
Paul