SP2013 master page notes

Webparts in rich edit fields

• need AjaxDelta around editable area in order to insert webparts in them (see thread: Why do my Web Part properties not show up?)
• sometimes you just need to insert another webpartzone to be able to insert webparts in some placeholders
• not all the html editor controls could have webparts inserted; has to do with the hidden webpartzone used for those being in PlaceHolderMain (see http://sharepoint.stackexchange.com/questions/59423/cannt-add-web-part-to-publishingwebcontrolsrichhtmlfield)

If added/removed contentplaceholders in master:

• if you add/remove a contentplaceholder, you need to create a temporary page layout using that master page and see what changed in the head section and compare that with your existing page layouts and make similar changes;