Yesterday (9-15-11) I updated Acrobat 9 Pro to version 9.4.6. (The previous version was probably 9.4.5, but I am not sure.) PDFs generated before and after the update that use purchased fonts (Minion, Avenir) no longer print those fonts in italics. Any italicized passages print as unformatted. Before the update there were no problems with printing in italics. The PDFs display the text correctly on the screen. Only when printing does the text become un-italicized.
I installed Adobe Reader 10.1.1. Same result as 9.4.6.
Sending to a different brand printer has the same result.
No problems printing from the word processor (OpenOffice 3.3.0).
Printing from the PDF to a new PDF has the same result. Text is correct on screen but not on paper.
Generating a PDF on this computer and then printing it from a different computer running Reader 10.1.0 has no problems.
What happened? What can I do to fix it. If there is no fix, is it possible to roll back to the previous version?