Mike Kaply and other Midas users have noticed problems/errors (inability) to set designMode='on' unless that is done in the load handler for the <body>
To me it seems you cannot set designMode=on before the content document of the iframe is fully loaded.
I don't have a testcase for this bug. I think some of these "weirdnesses" (elaborated by Anders and Vidar) have been fixed in other bugs (for 1.4final). If someone could supply a testcase, that'd be great. If not, I'll resolve this bug as invalid.
In my opinion, this bug is the same than the <a href="http://bugzilla.mozilla.org/show_bug.cgi?id=207842">bug 207842</a>
Yes, this and bug 207842 are the same issue, that one has several testcases.
duping to newer bug with more info *** This bug has been marked as a duplicate of 207842 ***