When I try your site in IE, I get the following results, on the following pages. As you'll see, on the first two pages, I'm seeing errors on pages that have the Locator component operational on it. Additionally, on the 3rd page, I'm not seeing any errors and this page works (shows the Login with Facebook button, though that module currently seems to be disabled on these pages) with IE, Chrome, and Firefox and this specific page is not loading everything that comes with the Locator component. I do not believe there are any issues with your template, as I mentioned through email, since these errors appear in the Beez5, Atomic, and Beez_20 templates as well.
The Larper home page - Page has locator component AND JFBConnect enabled:
thelarper.com
IE8 - Error popup on page load "Stack overflow at line: 1" (this error pops up twice)
Firefox (Error console) - Error: too much recursion. Source File:
thelarper.com/media/system/js/mootools-core.js. Line: 1 (Error appears twice in log)
Ultimate Larp List link - Page has locator component. JFBConnect module is -not- loaded on this page:
thelarper.com/larplist.html
IE8 - Error popup on page load "Stack overflow at line: 1" (this error pops up twice)
Firefox (Error console) - Error: too much recursion. Source File:
thelarper.com/media/system/js/mootools-core.js. Line: 1 (Error appears twice in log)
Submit your LARP - Page does not have Locator component -or- JFBConnect loaded
thelarper.com/submit-your-larp-to-the-list.html
IE8- No errors
Firefox - No errors
Hopefully, you can see from the above that the 2 pages with the Locator component have issues, regardless of whether JFBConnect is loaded on it. The page without Locator has no issues. Unfortunately, we can't fix other components. I don't know what the recursion error is with Locator, but if they're are stating this isn't from them, I'd recommend you show them this post or recreate and take screenshots of the errors happening.
If you aren't seeing any of the above, let us know. We'll gladly take screenshots to show you all 3 pages in IE (with the pop-up error) if you'd like.
Hopefully this helps explain. We'd love for you to get past the compatibility issues, but unfortunately, Facebook's Javascript library doesn't tolerate Javascript errors very well, and there isn't much we can do about that other than help you narrow down the features on your site that may be causing Javascript problems.
Best of luck,
Alex