First of all, I'm running a jailbroken (with blackra1n) 3.1.2 3G S 32GB. Everything worked fine this morning, then I updated MobileSubstrate and an update to RockApp, both from within Cydia. I just noticed a moment ago that when I tried to open the eBay app and Facebook app, as soon as I pressed their icon it was as if the app opened for a millisecond, then closed again. I rebooted my phone, now all my apps are gone!! All I'm left with is the stock apps (YouTube, iTunes, etc), and ones I've installed from Cydia/Rock, plus the Cydia/Rock apps themselves - ALL my AppStore apps have simply disppeared!! Help!