is still up but the case designs have since been pulled from the site. The case designs, which have a mock iPhone 5 inside them, show a phone with rounded edges and an brushed aluminum background.

The designs confirm a lot of what we've seen and heard about the next-generation iPhone. In fact, the designs line up nicely with that the new phone will have a metal back and a slightly smaller bezel to fit a larger screen.

Now, this isn't the first iPhone 5 case leak we've seen--and such leaks are not always the most reliable indicators of iPhone design. Back in May, for example, a Chinese manufacturer put out a prototype case for the "." However, this leak may be slightly more reliable, as Case-Mate is a fairly established name when it comes to iPhone accessory manufacturers.

The timing of the leak also lines up well with earlier iPhone release schedules. The iPhone 3G's design was revealed by an early case leak about a month before release and most analysts and rumor sites agree that the iPhone 5 will launch sometime in October. If Apple wanted to give some manufacturers an inside scoop they'd likely have done it by now.

It seems likely that some manufacturers at least know something they aren't telling. Other manufacturers haven't leaked new designs, but they have put up similar preview pages, such as this one from .