Persistent footers between transitions don't work anymore (since alpha 3)

Persistent footers between transitions don't work anymore (since alpha 3)

Hello,
 
I've updated an application from the jQueryMobile (alpha 2) to jQueryMobile (alpha 3) and now the footer isn't persistant anymore during transitions . I've set  the "data-position" attribute to "fixed" and gave all footers the same "data-id" attribute.
 
I've seen that the persistent footer also don't work in the jQueryMobile (alpha 3) demo too (on iPhone and Safari-Browser). ( http://jquerymobile.com/demos/1.0a3/#docs/toolbars/footer-persist-a.html)
 
Is that a known problem since alpha 3?
 
Thank you for your answers.
 
Pascal