Acrobat 9.4.6 Pro loses italics when printing

Question

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?

Answer 1

Engravers Gothic Italic + also  Bold no longer prints out
I use Adobe Pro 9, Word (Office 2003 - SP3) and Windows XP Pro (SP3) and all have been updated in the last 2 weeks. (Updated to Adobe 9.4.6)
Over the years, will all the same software as above, I have used Engraver’s Gothic BT (True Type) font, and especially the italic and bold version of it, in my Company letterheads and logo.
Now, when printing out an old .pdf letterhead document, I find that the Engraver’s Gothic Italic Bold font has been substituted by an odd-looking/unrecognisable font that is not in my Windows font directory, and the normal italic (i.e. not bold) has been straightened back upright.
(It does not look like a different font, but as if the software has straightened out only part of the font, leaving a “bold” shadow italic version in the background).
The old .pdf letterheads look as they always did on the screen, but when they are printed out, something has substituted the unusual Engraver’s Gothic italic font for the unrecognisable one.
A new Word document, converted to .pdf, similarly shows my “usual” Engraver’s Gothic Italic style and font and both look entirely “normal” on the screen, but when printed out as a .pdf, the font is again substituted/replaced by the above unrecognisable font.
(Word still prints out the italic and bold version without problem).
The normal version of Engravers Gothic is not affected in Adobe – only the italic version is substituted – the normal italic is straightened back up and the bold italic is the odd, shadow version.
I have an old laptop that has not been updated in the last 2 weeks and that prints out .pdf’s with the italic version without any problem i.e. it seems that a software update in the last 2 weeks has affected this italic font.
Removing, re-booting, then re-installing the font makes no difference and it is also the same whichever printer I use.
How do I get Adobe to go back and recognise and print out Engraver’s Gothic Italic Bold, as it has done, with hundreds of documents, over the last years?