I am experiencing this problem using Enhanced Protected Mode in IE11 on W7:

1. Sign in to SkyDrive
2. Locate a text file (*.txt) and select it.
   The page loads, but the text file doesn't open. SkyDrive shows a 'wait' animation of flying dots at the top of the window.
3. Add https://skydrive.live.com to Trusted sites
   The page loads and the text file opens for editing.

When SkyDrive is loaded in the Internet zone, some functionality is blocked, presumably by EPM. When it is loaded in the Trusted zone, the functionality returns.

The Trusted sites option is not attractive. It would mean having to add other sites, like https://login.live.com, to Trusted sites simply to be able to sign in to SkyDrive. Then every other site using login.live.com for authentication would also have to be trusted.

Is there an Internet security setting I can change to allow text files on SkyDrive to be opened and edited in the browser?