MacStories reports that the iOS 4.2 update scheduled for tomorrow has now been delayed due to a significant bug found in the gold master build. The bug involves WiFi connection issues found by developers currently running iOS 4.2 GM on the iPad. "Basically, even if the iPad manages to successfully connect to a local network, the connection is lost after a few minutes," MacStories states. "This seems to be the most common problem among users, although some can't simply use Safari at all." This bug isn't confined solely to the iPad, either -- our own Chris Rawson noticed the same WiFi connectivity issues while running