I haven't seen this type of error or bug with the 767-300 or, for that matter, any of the expansion models. Have you updated to the latest version, 1.5, or is this with an earlier version?

If it is an earlier version, get the latest version by checking-in to Your Profile > Product > Extended Download Service > Get New Links.
To be on the safe side, do not delete your older installers unless v1.5 works like it should. A few are having problems with v1.5.

Mark