Wow, this is driving me nuts. I have gone into three of my key communication applications: email, gmail, and google talk and in each application I have selected a DIFFERENT ringtone such that I can tell by sound which type of notification I am receiving. I have quadruple checked that I am doing this correctly by leaving the application after I have made the setting and then returning to check that the setting has been retained. This works fine. Then things go haywire. The first time that I receive a new email in the email (non-gmail) app the notification I hear isn't the one I set it too, it is the default notification sound!! When I go back into the settings in the mail app, sure enough, the setting has reset to the default! Has anyone else experienced this problem? Does anyone else know of a solution?