Loading/zoning crash problem is back with new patch.
 

As soon as new patch has been released, I started to have crash for more than 50% of my zoning/loading attempts.
It has been flawless without any crash (maybe 1 in 100 at most) until today's patch + downtime.
I will keep updating new information.
By the way I have 3 different computers and have a DSL(teksavvy) modem and also T1 connection in my workplace.
The crash is happening with T1 atm. I can't check my home DSL now.

(The crash symptom was identical to my home and work whether it was severe or non-existent before.)