500 error

Tom,
I just registered on your site without issue. Then, I logged out and back in again without any problems. Is there any specific way to recreate the problem? Is it only on registration, or is it on login as well? As for recommendations, I'd try:
* Disabling any caching you have enabled
* Turn off any JFBConnect profile plugins
* Turn off SEF URLs

None of those should be required permanently, but if you disable one of the above and things start working, that will really help us narrow down a possible cause and come up with more specific solutions.

Let us know if we're testing properly or not, and we'll go from there.

Thanks,
Alex

Tom,
Using the Chrome debug tools, the 2nd s-static.ak.facebook.com call is taking 32ms to load since it's already been cached. Almost all Facebook stuff has caching enabled (for a short period at least). The waterfall I'm seeing is that it takes about 1s for the page to be returned from your site. About another 0.5s to load all the images/javascript. And then less than 0.5s for all the Javascript (not just Facebook's) to execute for a page load time of just under 2s. That's pretty darn good, and I'm not seeing the slowdown your mentioning.

If you're using an online tool to check, those aren't always accurate as they won't take browser caching (which plays a huge role with FB stuff) into consideration. They will reload each element as if it's the first time.

As for the connect file you mention, there's no way to prevent it from loading twice. There are some resources that Facebook loads over http (non-secure) and the first Javascript file you mention is what does that. There are other elements that have to be loaded securely (https) and the 2nd Javascript file does that. JFBConnect doesn't have control over that.

Hope that helps explain, but if you need anything else or have other questions, just let us know!
Alex

No problem. If you still think there's issues or just want to discuss anything, just let us know. We'll be here!

Best of luck,
Alex