Unable to read symbols warning after updating to 4.3.3
I also faced this issue you should just delete that folder (/Developer/Platforms/iPhoneOS.platform/DeviceSupport//4.3.3), connect your device again, go to the XCode Organizer and it will ask you to collect the symbols from the device. After a couple minutes it will be done collecting and processing the symbols off the device, and you should be good to go.
As I've read elsewhere, making a symlink can take care of the problem. I had no success with refetching symbols from my ipad. This probably isn't the best solution, but it's working so far for me.
just run:
sudo ln -s /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.3.sdk/Developer/ /Developer/Platforms/iPhoneOS.platform/DeviceSupport/4.3.3 (8J2)/Symbols/Developer
You should open Organizer( Xcode > Window > Organizer ) and do something like "fetch symbols" I think when your phone is plugged in.