Looks like they may be contemplating a change to the Mystical Skyfire Diamond.
http://i112.photobucket.com/albums/n...108_024316.jpg
Credit: Thanks to Socio and Shinanigans for noticing the change.
When it procs the buff reads: "Spell haste rating is increased by 320."
So you would cast 20% faster for 6 seconds, instead of 1 spell 100% faster.
The internal cooldown seems to still be 45 seconds.
If they implement the change, this gem will become much less popular.