Testing icon change for app update

Testing icon change for app update

I'm getting ready to submit an update for an app, and this is how I'm
testing the update on my devices before I submit it:
Download the app from the App Store, run it and close out of it
Build from XCode to the device
On the iPad, when the app builds, the old icon is replaced with the new
icon. On the iPhone, there is no change to the icon. The app running is
the new version, but the icon stays the same.
I've tried running "Clean", restarting the device, restarting Xcode,
restarting my Mac, deleting all the files in the "build" folder of the
app's directory, and also renaming the icon files to be the same file
names as were in the original version (that was suggested in another
stackoverflow thread). All the icon file names are correctly listed in the
.plist file. I'm using Xcode 4.6.3
Anybody else have this issue with the icon not updating on an iPhone? As I
said, the icon DOES update properly on the iPad, so it seems like a fluke
issue...
Thanks in advance!