After upgrading my site to EPiServer 7.6.5 I got some strange errors in edit-mode. When I click on something that will load a tinymce editor I do get this javascrpt error: undefined is not a function
It is tinymce.dom.add that is undefined on row 175 in epidynamiccontent/editor_plugin_src.js.var mouseDownEvent = tinymce.dom.add(tinymce.DOM.doc, 'mousedown', self._handleButtonsClick, self),
After this error has occured almost nothing works anymore in the edit-mode.
I did disable this builtin epidynamiccontent plugin by removing from the possible tools in for XhtmlString property, and then the CMS works as expected.
Does anyone ahve this problem too?
It sounds a lot like this bug: