Step 1: Install Ghost Commander file manager program (available via Marketplace) OR if you cannotr connect to internet as you do this via WiFi (like I do, read the NOTE below)
Step 2: Open Ghost Commander and go to 'root:/data/wifi' folder
Step 3: Rename or Delete 'bcm_supp.conf' file
THAT'S IT! My WiFi is working again. Good luck!
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NOTE for those who cannot install Ghost Commander due to lack of WiFi to connect to MarketPlace via the internet.
Go to:
Ghost Commander and click on the 'Downloads' link.
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AN ADDITIONAL NOTE for users with Install Locked phones such as AT&T's Galaxy S. Install via the .
Go to: Settings | Applications | Development | USB Debugging
(this ought to work in general - I have installed other apps this way, not this one as I already had it on my phone)
HOPE THIS HELPS. Of course the normal disclaimers apply. I guarantee nothing, just posting what worked for me.