I have excel web app file stored on Skydrive.  I use the 'embed' feature to embed these files into a www page.  All worked with no issues.  In the last 24hrs, when the web pages load to display the embedded content, the iframe displays no excel content, just an error:

Server Error in '/x/16.0.1727.1027'Application.  Runtime error.

Sometimes the embedded files show OK, other times they come up with the error.

This happens from a range of PC (XP and Win7) , IPAD, Iphone4, Iphone 5, Iphone4s, Android devices.......all worked fine 24hrs ago.  I am guessing that this is a server issue at Microsoft  / Skydrive end.  How can I get someone to look into this?