White Screen

If you're seeing blank white pages, that means there is a PHP error of some sort. Please go to the Global Configuration area of Joomla and set Error Reporting to "Maximum". Then, try to recreate the error. There should be a descriptive message explaining what happened. If you don't know what it means, please post it here and we can gladly help you diagnose the problem.

As for the refreshing, I didn't see that when I went to your page. The only thing in JFBConnect that could cause that is if you have the "Automatically Log Facebook Users In" setting enabled. Then, if the user comes to your site and is not currently logged into your but is logged into Facebook.com, JFBConnect will try to log that user in. It should log them in after the refresh. If it's not, that's a problem. You may also want to display the "Show 'Logging In' popup" setting which will display an overlay popup to the user to let them know they are being logged in.

I hope that explains some of the behavior. Again, for the PHP error, let us know what the message is and we'll help you figure that out as well.

Thanks,
Alex

The messages you report in 1 & 2 are PHP notices that are now showing because you set Error Reporting to "Maximum". Both are 'notices' which is the lowest severity and really not something to be concerned about. They messages are also both coming from something other than JFBConnect, so I can't really comment on why those notices are occurring.

For #3, I'm not sure what's happening, but it's probably related to the Error Reporting setting as well, especially if the Gallery is reliant on Javascript/AJAX-y type calls.

Unfortunately, that doesn't explain why you needed to disable the automatic login feature. Can you leaving Error Reporting at 'Maximum' and re-enable automatic login again? Then, see if you can get the white (or error page) to show when the page tries to do it's automatic refresh. If there's a message on that page, relating to JFBConnect, that will help explain why the auto-login is causing problems.

After that test, I'd say switch Error Reporting back to "None" so that the other issues you mention above go away.

I hope that helps,
Alex