GC added to Mirror Image

I haven't seen this written anywhere. It's possible that with all my skimming, I simply missed it. But before 3.1, the global cooldown was not triggered when Mirror Image was cast. From Wowwiki we get the following (retrieved on 4/20/09):

This spell is not affected by the global cooldown nor triggers it, making it a universal DPS increase to cast.

This was obviously written before 3.1, because now... well... it does trigger the global cooldown.

I simply wanted the mage community to be aware of the change if they weren't already.