Ok folks here's the thing. I've got the same exact problem on my site:
www.w00tstudios.netRSGallery gives an Operation Aborted message anytime you try to open any link to an image or the index of galleries. In FireFox the gallery functions perfectly.
The problem stems from the addition of Mootools to RSGallery. My site already uses Mootools on the front page in numerous places and in a rotating banner at the top of the every page.
As soon as I disabled the rotating banner for RSGallery's portion of the site the gallery started functioning perfectly in IE7.
I got around conflicts with mootools in my other implementations by calling for a mootools script in the header of my template. I then modified my other components / modules to reference that library instead of trying to load 3 different librarys (which is not possible with most modules / compoents that use mootools in the majority of browsers).
The easiest way for you to get rid of this bug for your users is to add the option to remove the use of mootools from RSGallery b/c there is no way to prevent these conflicts and you can't expect everyone to not use other modules or components with mootools.