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Facebook connect not working in iphone webapp mode
I have facebook working fine on my site. It also works fine when site is run in safari on iPhone but if you run in iPhone webapp mode, that is, via an icon on the home screen you get a blank window after the facebook login step.
I'll try look into the issue further but not having a mac it is tricky to debug iPhone issues.
If you run in Web app mode though it does not work, either does JFBC connect.
But I did just find a hack to make the JFBC version work.
Please test login with site running in iPhone web app mode, that is add the website to your home screen first, this is different functionality to just opening the site in safari.