I just upgraded my LG Lucid yesterday, and now I can't use my phone as a hotspot. I even uninstalled Juice Defender, and neither FoxFi (WiFi mode has failed on your phone. Please use Bluetooth mode instead.) nor Mobile Hotspot (Unfortunately, Provision has stopped) work. My laptop doesn't have Bluetooth, so that's not an option: I've either got to tether via USB or WiFi. I should also note that my laptop is a chromebook, so my capabilities on that end are limited.

In conclusion, foxfi used to work great before the ICS upgrade, now it doesn't work!
Thanks for the help.