yep...same thing here...went back to stock ICS, took the OTS update, updated SU, updated binaries, did the Rootkeeper thing...updated to JB...restored root...and no root. well, time for me to get ready for work...I'll have to try again tomorrow...I suppose I'll use the M for today, haha
I did the same thing, but I was on OEM stock ICS with the small update, no root.
Downloaded this, then rooted with no reboot, updated Superuser then with voodoo backed up root, then removed the main root.
Updated this morning, restored with voodoo and now root IS WORKING. Just tried with wifi tether, IIRC I have not even rebooted yet since the leaked update.
edit: adb:
D:\android>adb shell
* daemon not running. starting it now on port 5037 *
* daemon started successfully *
shell@vanquish:/ $ su -
su -
root@vanquish:/ # id
id
uid=0(root) gid=0(root) groups=1003(graphics),1004(input),1007(log),1009(mount),1011(adb),1015(sdcard_rw),1028(sdcard_r),3001(net_bt_admin),3002(net_bt),3003(inet),3006(net_bw_stats)
root@vanquish:/ #
DOUBLE EDIT: Make sure you are using the Superuser app with the green android with an eye patch, the other one didn't work on the leak (not this version), and was very confusing... forget what it was called but I went through some bouts with it and deleted that bad one. I have Superuser installed now.