As discussed earlier and documented in http://www.mediawiki.org/wiki/Parsoid/MediaWiki_DOM_spec#Template_content, content bits interspersed between multi-part templates should not be editable, as they cannot be easily escaped. We currently don't perform any escaping on these, so changes of these by the user can break the page in very non-WYSIWYG ways.
Version: unspecified
Severity: normal