Weird vertical warping ..... no idea whats wrong

Buy a plastic knife or start using glass... Oh, you meant with the print.  You either aren't retracting enough or you are over extruding slightly.  On really small prints it is more noticeable.  I am also wondering if you have dialed in the VREF for the extruder. 
All of the above is assuming that you really do have everything else moving as smoothly as you say.

whats the vref?   i have calibrated the extruder before, is pulls in exactly what i tell it too, i watched the video.  Tried glass,  i just dont wanna keep hairspray on supply ... got 2 new kapton tapes coming.  i have retraction set to only retract when crossing perimeters and a 1mm retraction.  and you right, i did a larger print befor i went to bed, dosent seem like its there on that one.

belt tension is fairly tight, but i have the bearing with the pillow block installed and my circles are fine, printhead does seem like it has a bit of play in it, not too much though.  how tight should it be?

ok if im following  http://www.solidoodle.com/multimeter-te … olidoodle/  correctly, and measuring red lead from c39 and black lead from the chip, like shown here, http://solidoodle.wdfiles.com/local--fi … v%20E.JPG, and my multimeter is set like so, .   

Am I setup right?  3.3 volts are going to that motor?  or am i messing something up?

Once you do that fine tune by ear...  set it up for a nice slow extrude with some real length so you have time to adjust it.  You should be able to hear the pulse of the stepper.  Just get it running as smooth as possible.

The least amount of pulsing.  Slow it way down it also helps to put a mark on the drive gear.  You can see it pulse.  You just want it rotating as smoothly as possible.  All you can do is experiment with it a little.