Jacek Caban (@jacek) commented about dlls/mshtml/editor.c:
nsICommandParams *nsparam; cpp_bool b = FALSE;
- if(doc->browser->usermode != EDITMODE || doc->outer_window->readystate < READYSTATE_INTERACTIVE)
- if(doc->browser->usermode != EDITMODE || doc->browser->content_window->readystate < READYSTATE_INTERACTIVE)
`browser->content_window` is not necessarily the same thing as `outer_window`, it will be different for iframes.