On another note, I have greatly improved my ability to print ABS without it lifting off the heatbed using this item I found on Thingiverse:

http://www.thingiverse.com/thing:701002





I won't go so far as to say the problem is solved (I have some more testing to do) but on the few ABS prints I have done so far, not only is the corner lifting gone but after printing, the part is stuck to the bed hard just like PLA prints are and that is using just hairspray!! I'm pretty happy with the results so far.