navigation buttons with XeLaTeX
When building a presentation with pdflatex, the navigation buttons in the default theme (in the bottom right hand corner, for moving between frames / framesets and so on) work fine: it is possible to go forwards and backwards between overlays, frames and sections. Building with luatex also works.
However, when building with xelatex (which I want to do for its support of OpenType fonts and Unicode), the buttons are not active; the mouse cursor doesn't change when it hovers over the buttons, and clicking merely goes forward one slide (as a click does anywhere in the pdf viewer). Other links do work: for example section links in the outer "sidebar" theme are active and function as expected.
I've tried tracking down the problem myself but have gotten lost in the tower of files -- and I don't really know how to debug TeX in any kind of efficient way. I'm willing to help as much as I can to help isolate and fix the problem.