Enterprise App Distribution (Wi-Fi) says "Could not download app" sometimes
<p>We have an iPhone app developed in-house and distributed over wi-fi following <a href="http://developer.apple.com/library/ios/#featuredarticles/FA_Wireless_Enterprise_App_Distribution/Introduction/Introduction.html" rel="nofollow">apples docs</a></p>

<p>About 60% of the employees devices can download the app without any problem. For 40%, the installation process stops at 75% and the message <em>"Could not download app"</em> is shown.</p>

<p>Anybody experienced this or know how to get a more descriptive error message?</p>

<p>Thanks!</p>
