Stefan Mileschin

Apple is rejecting applications that use Dropbox because if the user of such an application does not have the actual Dropbox application installed, he is presented with a Dropbox login form through Safari, which happens to also show a sign-up link, and after clicking on that sign-up link, users could potentially run into one of the paid Dropbox options. Application developers and users surprised by this may need to read about the frog and the scorpion.

http://osnews.com/story/25898/Apple_...at_use_Dropbox