A new report suggests Apple will unveil the next version of its mobile operating system at a media event early next month. German Apple enthusiast blog Macerkopf.de cites a trusted source in claiming that Apple will reveal iOS 5 and new MobileMe features in early April. The timing of the rumor is in line with Apple’s announcements in years past; Apple held its iOS 4 event last year on April 8th. Among the more anticipated changes expected in iOS 5 is a completely revamped notification system. We have discussed Apple’s notifications system several times on BGR, and we even said iOS notifications were “as disruptive as notifications on a mobile device can possibly be.” Apple is well aware of the problem, and the company hired Rich Dellinger last year — the man widely regarded as being responsible for the fantastic notification system found on HP’s webOS platform. Apple has not yet confirmed any details surrounding the next version of iOS or an event next month.