At a time when Apple is apparently involving in fixing the bugs in its newest operating system, the iOS 6, rumors have started making rounds about Apple's supposedly ongoing efforts in developing the next iteration of the operating system - the iOS 7.

According to the rumors, Apple is probably running behind schedule in its development of iOS 7, which will likely feature some "significant" design changes, including a completely new display.

About the rumored delay in the development of iOS 7, Daring Fireball's John Gruber has revealed in a report that the `behind schedule' development of the new iOS is evident from the fact that a few engineers from Apple's Mac OS X 10.9 team have been asked to work on the iOS 7 because additional workforce is required to catch up with the software's planned development schedule.

Gruber, who is an Apple blogger, also said that the design of the iOS 7 has undergone such a significant revamp that engineers are making use of polarized display filters in public, so that the all-too-curious observers are not able to spot "the significant system-wide UI overhaul."

Meanwhile, the rumors of Apple accelerating the development of a possible iOS 7 suggest that the company is probably developing the new iOS for release at the early June-scheduled Worldwide Developer Conference, an event at which the developer versions of Apple's software are generally released.