NOTE TO READERS: I have no control over this, wordpress.com implemented it across the board. My advice until they fix it is to make sure you are running a modern updated browser, Such as Firefox. – Anthony
from the wordpress.com blog:
Post Comments Using Twitter and Facebook
Starting today, visitors to your blog can use their Facebook or Twitter account to leave comments. This saves everyone a few steps and gives visitors control over which identity they use. It’s a win for everyone.
See the new commenting screen below:
As an important touch, we let you stay logged in to multiple services. This means you can stay logged in to Facebook for convenience, but still leave a comment through Twitter or your WordPress.com account. Just click whichever identity you’d like to use, and the selected one will be associated with your comment when it is published. You’re in control of your identity, as you should be.
Depending on your theme, you may notice the comment area looks different than before to make room for these new features. We also intelligently choose to use a light or dark visual style for the comment box, depending on the theme you are currently using.
And since you know your readers well, you can now change the text above the comment box to be whatever you like. We recommend using the default we are applying to new blogs, “What are you thinking?”, as questions often encourage more comments, but you can change it to whatever you like by going to your dashboard, then Settings → Discussion.
We know you like comments and this will help you get even more. Stay tuned for better Twitter and Facebook integration features, coming soon.