Firstly, I have been a member of a couple of other leading WordPress/Joomla developers but nothing is as simple and good as your Gallery pages! it takes less than a minute to create a gallery! Awsome!
I have a question as silly as it may be: If I add an image 900px wide and another 800px wide do they resize when they show at the front end in the page of the site? Will one crop the edge e.g. 900 or are they responsive within the page?