I use Chrome as my desktop browser of choice, yesterday (21st) all my shortcuts to URLs had their names changed from (eg) "SiteName" to "SiteName.url" and the files all contain a bunch of text:
Which now means that they are all broken.
Sorry that this is not a development issue but the Microsoft forums are hopeless!
Note: This also occurs when I create a new shortcut. The shortcut has ".url" appended to it's name and when activated just displays the text content.