The game was pulled for some time from the App Store because of a trademark dispute. Mobigame had to remove the game because of a legal issue with Tim Langdell
from The Edge
. According to David Papazian
from Mobigame, Langdell said to own the name Edge as a trademark and from there the legal dispute began. Without further explanation the game eventually resurfaced with the initial title. Then it was taken down again until it came back online after in October 2009, after a few months, with the title Edge by Mobigame
in the US/UK.
More information about the different disputes concerning the "Edge" trademark can be found through the related links at Tim Langdell's profile.