The Rad Editor control removes unformatted spaces between differently-formatted words when the user presses Enter key for the first time in IE

Steps to reproduce:
    1. Go to http://demos.telerik.com/aspnet-ajax/editor/examples/overview/defaultcs.aspx and clear all the pre-existing text.
    2. In the empty editing area, type two words separated by a space.
    3. Select the first word but not the space after it, and apply either italics, boldness, or underlining.
    4. Select the second word but not the space before it, and apply a different one of those formatting options.
    5. Position the cursor at the end of the line, and press Enter

Result: The space between the words will vanish. Firefox users will see underlining indicating that the browser considers the new, merged word to be misspelled.