Blank-page bug in XeTeX 0.96

I've had a report of what seems to be a new bug introduced in XeTeX  
0.96 -- I need to check further, but it appears that there's a  
problem with xdv2pdf such that any *completely* blank pages will be  
omitted from the PDF that is generated.

A workaround would be to put some kind of "ink" onto blank pages --  
it could be just a rule colored white, for example! -- so that the  
driver doesn't skip them. Of course, if they have page numbers or  
trim marks or anything, they're not blank and so there's no problem.

If my guess as to what's happening is right, I should be able to fix  
it and release 0.97 very shortly, but I thought users should be  
warned of this one, as it can give incorrect output after an  
apparently-successful run.

Humble apologies to anyone affected!

JK