I'm guessing its something to do with using accounts thru Blur or Motorola. I cant check my phone to see, but I was gonna try to setup Yahoo with the Add Accounts settings and I got a pop up about agreeing to use Motorola something, might have said Services. I declined. I never used Blur or Motorola for anything like that before.
I bet its like AZDroid said.
I see Twitter in the screen shot. Is that thru the Add Accounts settings, or is that its own separate app you installed?