I haven't noticed anyone else post this issue - ever since I updated to Gingerbread I am getting notification sounds for no apparent reason. I do not have voicemail waiting or pending appointments. I have updated again to 4.5.602 and I still have the issue. I have tried settings/sound and I can't locate a solution. I am new here so sorry if this sounds silly to you but it is annoying as it happens quite often.
Thank you, in advance, for your help