For those who are interested, I packet sniffed and downloaded (on my PC) the 27MB Xolo "update" that causes all the problems and prevents rooting...
You can also try:
Rename it to .ZIP if it comes down as .DAT, and explore (just DO NOT install!)
*** Curiously, if you remove the last digit of 383.dat in the URL bar, and make it into 380, 381 etc, it downloads different sized updates... hmm... wonder what they all are ...
### COULD THE JELLYBEAN UPDATE BE HERE?! ###
Edited by glossywhite, 14 April 2013 - 04:54 AM.