Thijs van der Vossen from Fingertips, developer of our new galleries for iPhone, iPad and other mobile devices, wrote a great post about a workaround for the limit of image data that can be loaded on a single HTML page in Mobile Safari. This limit is somewhere in between 8 and 10 mb.
When loading a gallery with 30 images of 500KB, Mobile Safari simply refuses to display the last 10 images. A problem that already occurred in a previous version of our mobile galleries.
To guarantee properly loading of images in larger galleries we are optimizing our images for Mobile use. Special more compressed images are generated, to solve the resource limit in Mobile Safari, but also to make loading on mobile networks much faster.
Check his post here: How to work around the Mobile Safari image resource limit