AI behavior: Random no attack

[Jean le Chauve]

16.07.2011 FranAvalon reported:
Sometimes the Ai doesn't attack when it can attack without problems (no blockers for example or no creatures controlled by opponent).

I am not sure if this is intentional, a coded random behavior, or it is a AI problem. This is a problem which was notice since long time ago by community, and I think that would be solved, because it down the AI performance.