I have no way to confirm this. I haven't been able to play because of financial reasons.
There has been someone that mentioned to me something about a Challenge Mode dungeon thing and something to do with the timer.
I have been looking around through (what I could find of) the code and can't seem to find anything about the timer for Challenge Mode.
Any info would be of great help (or even if someone can double verify this for me)
http://www.wowinterface.com/download...eter5.0.5.html