When end-user changes the font-name and size of a single word in the content, pressing spacebar resets the formatting to its default state. 

Steps to reproduce:

    1. Go to http://demos.telerik.com/aspnet-ajax/editor/examples/overview/defaultcs.aspx;
    2. Remove all content and add a simple sentence, e.g., "some text";
    3. Highlight "text";
    4. Change font-name and size;
    5. Put the cursor right after "text"
    6. Press spacebar (add white space)
    7. Type another word.