Issue with Acrobat 10.1.2 and Windows 7 64-bit Preview Handler

Hi. I work in an enterprise environment that is currently migrating to  64-bit Windows 7. The only version of Acrobat we have approved for Windows 7 is 10.1.2. We're seeing an issue with this version that causes the preview handler to not work. The preview panel in Explorer is just white and will eventually give the error "Preview handler surrogate host has stopped working."  I've tried to fix listed on http://www.pretentiousname.com/adobe_pdf_x64_fix/index.html but that registry key is already correct. Our current work around for these users to just install Reader X1 and make it the default PDF handler, but I would like to find a better solution. Is there a known issue with Acrobat 10.1.2 and 64-bit operating systems? Or is there a way to change just the default preview handler?