Tablet makes it wierder. Rotation does change the forum layout some.
If I hold my tablet verticality, I see a square with all of Carl's upper body.
If I rotate it, the avatar becomes a rectangle larger than the square, but with only part of the avatar. The left* shoulder and arm, and the tip of the left* ear, are completely cut off.
*Left in relation to Carl, right in relation to the viewer.
(This is Nexus 7 with the most recent iteration of Google Chrome for Android.)