I have an app that I'm trying to install via standard OTA ad hoc. On iOS 4.1 The app installs ok. On newer versions (4.3.1 and 4.3.3 tested) the app installs without error, but the icon disappears from Springboard when the install is done. If I restart the device the icon is back.
I have two questions:
Edit: It's the whole icon that disappears, not just the graphics. It is not possible to start the app from Springboard.
I think this question is similar to this one:
In-House App Disappears After Install
Give it a try, maybe it helps...