I have a 18.104.22.168 installation using the iPhone theme. Using PayPal Website Payments Standard which redirects off the site to paypal you find the landing page is not mobile optimised. Seems that it is necessary to make modifications to redirect to a mobile optimised version of the paypal payment page if the mobile theme is running.
Anyone have any input on this ? It is pretty pathetic that Paypal with all their money cannot be bothered to develop a landing page in HTML5/CSS3 that will auto adjust to screen size and save us a load of grief.