Quote Originally Posted by Leith Ross View Post
Personally, I think it would be a very unstable environment to have 32 and 64 bit Office versions installed on the same machine, especially if you are doiing code development.
I ran such a setup for the best part of a year with no issues. The only drawbacks for me were that my favourite add-ins didn't have 64bit versions so I tended to stick to 32bit for development anyway, but I had no stability problems. I can appreciate that most people would probably prefer to use VMs for this rather than go through what is a slightly fiddly installation process though.