As rumors of Snow Leopard continue to swirl, it looks like Apple will be stringing Leopard along for quite a while longer before the next iteration of OS X debuts. According to reports, Apple has seeded a new OS X build to developers and testing is currently under way. The new build, 10.5.7, is said to focus on maintenance, security and synchronization. Apparently the seventh variant of Leopard is a pretty substantial improvement even in its current form — specific areas Apple is targeting with the update include graphics drivers, Time Machine, printing services, screen sharing services, MobileMe syncing, Mail and AddressBook syncing, AirPort services, text services and iCal. Beyond that, about 70 code corrections are said to have already been identified in the build. Needless to say if this rumor turns out to be true, we’re certainly looking forward to seeing an update that will resolve a healthy amount of the issues currently plaguing OS X. Of course we shouldn’t get ahead of ourselves; we likely still have a few months before 10.5.7 sees the light of day considering testing has just begun.