"hmm, is IE7 refusing to send cookies to a third party site (from mjtemplate.org to freebase.com)? ..."
IE7 is blocking Freebase.com cookies.
Using IE7, the MJT example which accesses Freebase fails with
error: browser could not contact the serverWork-around:
you may need to sign in.
In IE7, Internet Options / Privacy / Sites /
freebase.com = Always Allow cookies