First off, love 2.7 and have 30+ blogs all running it all on the same server without a problem ... except for one site!
On one particular site the left-hand menu is whacky with each menu item moving to the right about 20 or so pixels until the bottom where some have the text all the way to the right and the icon on the next line down on the left. They all function fine, just hard to deal with.
Secondly, even though TinyMCE is visible on post pages it disappears on Page edit pages. I have deleted all files and re-uploaded and still no-go.