When I say this, I mean all off them! It doesn't matter how safe the blog is it blocked. The only way I can get to them is if I turn my firewall off. This is very frustrating and annoying this really needs to be fixed. I am sicking messages the read:
Your Internet access is blocked
Firewall or antivirus software may have blocked the connection.
I can only get to my dashboard on tumblr and can't go to any individual tumblrs and catch up on them.