Triple-Post!
Aus dem Adobe-Forum:
Acrobat and Reader 9 are similar to Acrobat/Reader 8 - they contain a 32-bit iFilter bundled with them that supports 32-bit operating systems. We're working on a stand-alone PDF iFilter 9 64-bit right now, and our goal is that it will support XP 64-bit, Vista 64-bit and a number of the other platforms mentioned on this forum. However, I don't have a confirmed time frame to share with you regarding when this will be released. It definitely won't be available in the next month or two.
Please continue to post feedback here, and we'll release PDF iFilter 9 64-bit as soon as it's ready.
Regards,
Dave Stromfeld, Acrobat Product Manager
http://www.adobe.com/cfusion/webforums/forum/messageview.cfm?forumid=72&catid=654&threadid=1375238&enterthread=y