Answered
Using Acrobat Standard 8.1.4 on Vista, PDF Printer is set as the default printer.
I can successfully create a PDF from any source, Word, a webpage, from Outlook and save it in the designated directory. But the PDF printer folder shows all documents errored out. Everything backs up until I manually cancel all documents.
I've tried switching the preferences around, and changing the printer from a COM port to an LPT and back, but nothing changes the outcome.