jQM 1.2.0a1, Two links to the same page, with different data-transition will always stick to the first used.
Playing with a very simple demo page, I stumbled on an odd behaviour, one that I didn't see in 1.1.1.
Normally you wouldn't have two links going to the same page, with different transitions. At least no the slide and pop I'm testing, however the case seems to be that which ever of the links you use first, is the transition that are permanently assigned to the page it links to, other links with different transitions will ignore their own, and use that of the first link.
The attached example is pretty simple.