Since the maintenance this week - Guild bank Logs have been completely missing.
Guild Bank Log + Money Log are showing as completely blank and black.
I have confirmed this with many people in different guilds also.
I have reported this as a bug in-game and also opened a ticket in which I was told to post the issue here also.
With Hyjal and BT coming next week I would hope this could be rectified prior to then!
I personally have had to lock-down my guilds bank as no one can see who is taking what items and for what reason without the log.