This morning, my wife and I woke up to find that the Android 2.1 stock browser simply stopped working. I timed a page load for Google and it was nearly 60 seconds when it finally came through. I searched for hours to find the solution, and finally did just now.
At some point, something entered in values for the proxy and port settings in the APN.
Home-> Settings-> Wireless and Networks-> Mobile Networks-> Access Point Names-> [Your WAP].
We had to clear the proxy and port fields, and presto! The stock droid browser works again on 3G. Wtf?
This is on the Cincinnati Bell network.
Proxy value was: 220.127.116.11 and port was 80.
I should also note that Opera mini worked, even when the Android 2.1 stock browser gave up.