Ink problems in PPT 2010 Plus

I am having the same inking problem in Office 2010 Plus (not the beta) as I
had in the beta version last year. I use a Tablet PC extensively in my
classroom and often use my pen to annotate slides during slideshows (cloned
display). In PPT 2007, once I turn the ink on, it stays on throughout the
slideshow unless I turn it off. In PPT 2010, I have to turn the ink on for
each slide, which ruins the functinality for me and my students.

Does anybody know if this is a bu or simply a change in functionality in
Office 2010? Thanks!

PS: I purchased Office 2010 Plus through JourneyEd.com as an academic
purchase. Microsoft tech support insists they haven't released any final
version, but JourneyEd.com insists it's legit.