Moving will be made to interrupt spellcasting at a point in time...

[Icehunter]

When I think of moving while spell-casting I think of this:
http://www.youtube.com/watch?v=KZ04mfAY2BU

Current system would be just fine if only the lag and gui errors were gone (i.e. moving, cancel spell, try to cast again causes action bar to disappear with controller, including target)

Get rid of the lag/gui issues and we are cooking with oil~!