Backport cross-domain iframe exception fix to 1.4, refs #10771 !strict.
Backport cross-domain iframe exception fix to 1.4, refs #10771 !strict.

Also fixing spelling mistake in 1.4 and trunk.

git-svn-id: 674a2d6b1e32e53f607eb824547723f32280967e@21453 560b804f-0ae3-0310-86f3-f6aa0a117693

redaktor/deliteful