I am using the NextGen Gallery plugin with the WP-Lightbox2 plugin.
It all works fine until I view a gallery on Safari on a Mac (haven't yet tried any Windows browsers). When browsing from one image to another, the second displays a lot smaller than it is meant to.
Here is a screen grab of the problem.
I have disabled all other plugins and the problem persists.
I have also googled this problem and some other people have experienced but no one has posted a fix for it - if one exists!