Validator tool shows Invalid Card Type all of a sudden


#1

Validator says 'Invalid Card Type’
Sample URL: http://www.misterjonjon.com/2013/09/lg-g-pad-8-3-announced.html
Sample Tweets: https://twitter.com/MisterJonjon/status/374143535890857984 / https://twitter.com/jonjongoco/status/374144817682317312
What’s in the page source:

<!-- Twitter Cards -->
<meta content='summary' name='twitter:card'/>
<meta content='MisterJonjon' name='twitter:site'/>
<meta content='MisterJonjon.com' name='twitter:domain'/>
<meta content='LG Electronics (LG) today announced the LG G Pad 8.3 tablet, the latest addition to its G Series lineup of premium mobile devices.' name='twitter:description'/>
<meta content='jonjongoco' name='twitter:creator'/>
<meta content='http://www.misterjonjon.com/2013/09/lg-g-pad-8-3-announced.html' name='twitter:url'/>
<meta content='LG G Pad 8.3 with 1920x1200 display goes official' name='twitter:title'/>
<meta content='http://lh3.ggpht.com/-QTlSKblXgP0/UiMuxQteHXI/AAAAAAAAH0A/JWH38L0Mp0Y/s72-c/LG%252520G%252520Pad%2525208.3%252520Philippines%2525202_thumb.jpg?imgmax=800' name='twitter:image:src'/>
<!--- End Twitter Cards -->