Print to PDF, and Export (Interative (lo res)) work fine
with this version CS5 (i'm a late adopter!) i've not been able to get Export (Print) to work.
It let's me select the target output filename, and the PDF parameters, and then it just quits the export thread and immediately goes back to InDesign without doing anything (visible or functional).
I looked around to try to find bug reports, but none seem to match Export to PDF (Print)
specifically. I'm not 100% sure, but i believe Export (print) worked prior to this latest auto-update.