If you use your shield while moving, it will stay large till you release all directional buttons.
Logically, it should reset ito its normal size when [Block] button is released.
[img]http://i.imgur.com/cOzjt9h.png[/img]
Nothing gamebreaking, but shield is one of main features in this game...It should be polished.
I think that happens with swords as well.