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For what it's worth...Drewberry's post, below, worked for me in v 9, but then again, I have LaserFiche, as addressed in that article.
Here's the url again: http://kb2.adobe.com/cps/402/kb402063.html . Thanks, Drewberry!
I was able to solve the issue in Acrobat 9 under Windows 7 by simply removing (renaming the offending drs832.bak just in case I needed to recover it) from the SysWOW64 directory.