I haven't agreed with many of the charge/block calls today... against either team. The new rule is that both feet must be planted which means you could come to the arena early, plant yourself and not move until the last second of the game and if you lift a single foot before the offensive player charges into you then it is a block.
The rule used to have more to do with running through the chest of the defensive player. This is a change in interpretation they made this year and it doesn't seem to be working out very well.