jQuery Mobile horizontal radio buttons

Screenshots of unexpected results viewing horizontal radiobuttons on jQuery Mobile website

iPad 2 vertical - jQuery Mobile example

In the example below, the horizintal radio buttons last element wraps, where there is enough space for it to appear inline

iPad 2 vertical - agcolom example

This example looks fine

iPhone 4 vertical - agcolom example

This wraps as expected

iPhone 4 landscape - agcolom example

This does not resize to fit width - so unsure if problem occurs

iPhone 4 landscape - jQuery Mobile example

The last element wraps again - where it appears there would be space to the right?

iPhone 4 portrait - jQuery Mobile example

This dappears to be OK