Latest update to the system was set live few minutes ago, this time around it’s a new feature.
You now have the ability to set the theme image of your sub albums. Sub album theme image is the thumbnail that represents the sub album when browsing your gallery. Before this update, the theme image was automatically set to the first image uploaded into the sub album, but now you can change it to any image that’'s contained within the sub album.
To set a theme image, simply open the image which you'd like to use and click the new Album Theme link that’s located on the yellow Image Options panel. Once the tab pops open, click the Set as Theme button and you’re done.
This feature was planned for a while but few days ago someone made a request and it was bumped up the "to do list". As you can see requests do make a difference, if you have any post a message in the forum.