I just distributed my first ad hoc provisioning app to my iPad via iTunes and all seemed to have worked fine, except the fact that my app does not show an icon on the iPad, only a silver button.
When I start the app, the screen goes black for around 2 seconds, then the "desktop" is shown again.
I am not sure how I should go on now. There isn't any such thing as a "log file" on the iPad, is there? The reason why it doesn't really start might have a hundred reasons, I guess.
On the simulator it worked fine.
Thank you very much!
I think you've got the answers you need in the edits, but to answer the original question.
You only need to add UDIDs in the portal, nowhere else.
You can get crash reports from an AdHoc device. Sync the device and then look in ~/Library/Logs/CrashReporter/MobileDevice/
Alternatively, if it is your device, connect the device and use the Devices panel in the Organizer.
The plain white icon means you don't have an icon set for the deployment device. I've never had this after setting an Icon. Check the target summary for any icon errors, they're normally shown next to the icon space.