Bump.
Hey. I have same problem - i used snipper from Creating a NodeType that is Content and ContentCollection and added some properties to that contentcollection (in my case there is settings for wrapper: background color select and optional background image). Adding new content is working fine but after that i cant manage to edit contentcollection properties from inline editor. Adding static elements before/after editable field, as @mficzel sugested, won’t work - Contentcollection is not clickable.
Edit: I forgot to mention - “contentcollection” can be selected from Structure Module but is not an option when you have multi level structure…