I spent more than 4 hours dealing with this, uninstalling, reinstalling and continually getting the following error when Printing to an Adobe PDF 9.0 on OS X (10.6) Snow Leopard:
Error: /usr/libexec/cups/pstops failed
Or some other random error in the print monitor for the Adobe PDF 9.0 printer. Turns out, in the 9.x updates for Snow Leopard, Adobe removed the printer functionality and moved the option to the OS X PDF button drop-down in the print dialog. See screenshot.
Save as Adobe PDF
This worked fine. I hope this post gets some rankings and helps someone save their time dealing with this crap-o-la.