Apple has just released Mac OS X Leopard 10.5.7, and incremental update to their current desktop and laptop operating system (widely expected to be supplanted later this year by Mac OS X 10.6 Snow Leopard).

Why does this matter for iPhone users? When iPhone 3.0 Beta 4 arrived, note syncing — which worked fine under Betas 1-3 and OS X Leopard 10.5.6 — was suddenly gone, replaced with a statement saying simply that OS X Leopard 10.5.7 would be required for note syncing from then on. Beta 5 arrived with nothing but the same warning. Hopefully with 10.5.7 now available, note sync — still something of a sore spot having taken 2 years to deliver — will be restored.

Apple has also been known to sneak other iPhone friendly features, like Google syncing, into previous updates — and not so friendly bugs into others that made Jailbreaking more difficult — so we always keep our fingers just a tiny bit crossed.

Mac users, let us know if you find anything!

(Thanks daveizzle and sil3ntrid3r11 )