I have a beer (pale ale with all home grown hops) that went through a vigorous fermentation.  Fermentation started a couple hour after pitching.  It acted like every other pale ale fermentation I have done... it slowed way down after day 3ish.  But there is a layer of off-white bubbles on the top... big bubbles.  Its now day 12 and they are still there.  This has never happened in any of my beers.  
I tasted it and it tastes fine, no hint of contamination.  The other odd thing is its very cloudy.  And I can see a distinct color difference, its lighter on the top and darker towards the bottom.  I'm assuming this is yeast hanging in suspension?
Anybody experience this and is this an infection, did I overpitch or something else?  
Here is some details of the brew:
7.75lb pale 2 row
6oz carapils
6oz munich
4oz c60
2oz honey malt
2oz flaked wheat
.75oz chinook @ 60
.5oz cascade @ 20
.25oz chinook @ 10
.25oz chinook @ 0
.25oz cascase @ 0
I mashed at :152 to 153
SG: 1.044
Yeast: I pitched about 150 ml of wyeast 1056 slurry from a previous batch into a starter 48 hours before pitching.  I kegged the previous batch 3 days before so the yeast was fresh out of that batch (And that batch tastes great, no infection).
current gravity: 1.005 (I've taken 3 measurements and it  has not went down from there)
				

