(Working MEF, haven't tried this in FF yet.)  I cannot post vault or features images.  I tried to use the new admin area in MEF to upload a couple Christmas images in an editable area but the upload would not take.   Also, the upload option only shows vault, which I do not want.  Instead I uploaded the in the image as a gallery photo  and, using the old admin area, converted it from a gallery image to a feature image--well, that worked but is something less than practical.  Being able to upload images directly into Features seems a must--not to mention being able to upload images directly into the Vault.  And--not rushing you, but since lots of things I put in Features images are seasonal or otherwise temporary, and Vault image tastes change, being able to delete them sure is handy.... 

(Clicking on the photo icon for additional emoticons here pops-up the Support forum home page)