The gadget compatibility between CharInsert and wikEd is broken by the code in insertTags() in mediawiki.action.edit.js.
Problem: insertTags() remembers the last active input box or wikiEditor iframe - but not the wikEd iframe. Therefore, after using one of the wikEd input boxes (e.g. search or replace), the CharInsert defaults to that box and does not get reset to the wikEd iframe.
wikEd is currently replacing the global insertTags() function with its own function in order to be able to handle text additions to its iframe. This gets reverted by that input following feature.