Since installing 2.7 I've run across a couple of problems with the WP editor:
1. When editing an image, changes don't always take eg, if I paste in a description, it's not saved when I update. This doesn't happen every time. Also, ditto altering the image eg, adding a border.
2. Worse however, is the entire post disappearing when I update after editing. This only seems to happen after I've (tried) to edit an image.