I'm going nuts... every few times I unlock my phone, I get a default notification sound. Sometimes, just randomly while messing with an app, I get the mystery notification sound. No emails, no texts, no notification bar items... just <insert mystery notification sound here> somewhat randomly. It's not any app i recently downloaded either (=, I'm a bit more savy then that... lol... just want to see if someone else noticed this with the 2.2 OTA Leak. It doesn't do it while the screen is off thank god!! Anyone else?