jquery.mobile-1.0a4.min.css causing Firefox Error console to fill up with dropped delcarations

jquery.mobile-1.0a4.min.css causing Firefox Error console to fill up with dropped delcarations

I realize that jQuery Mobile is marked as Alpha, but I can't find a single post related to this fact (and how to solve it).

https://github.com/jquery/jquery-mobile/issuesearch?state=open&q=declaration+dropped

Just making the most simple of pages results in about 100 messages like this:
Warning: Error in parsing value for 'background-image'.  Declaration dropped.
Source File: http://code.jquery.com/mobile/1.0a4/jquery.mobile-1.0a4.min.css
Line: 16
Warning: Unknown property 'border-radius'.  Declaration dropped.
Source File: http://code.jquery.com/mobile/1.0a4/jquery.mobile-1.0a4.min.css
Line: 16




I even try to hit the http://jquerymobile.com/demos/1.0a4/ and that too shows all these errors in the console.

But what is worse, the page doesn't even render very simple example as shown in the 'jquery mobile no output.png' image attached.
  1.     <link rel="stylesheet" href="http://code.jquery.com/mobile/1.0a4/jquery.mobile-1.0a4.min.css" />
  2.     <script src="http://code.jquery.com/jquery-1.5.2.min.js"></script>
  3.     <script src="http://code.jquery.com/mobile/1.0a4/jquery.mobile-1.0a4.min.js"></script>

Just the act of putting that first .css line in my existing index.html causes my page to not render anything but a blue background. If I take out my existing .css then the page is just plain white (like the image above), except with all my HTML in the view source.

I tried to put jquery mobile locally on my web server too and got the same results.

Anyone have a solution to this?