Even with the latest firmware (3.x) for the E61 there is a bug with message (SMS) notification. If you are using a BT headset (brand or model doesn’t matter) the notification is very loud and can cause hearing damage. This needs to be fixed. Apple faced a class action lawsuit with the iPod. People could turn the volume all the way up and damage their hearing and they faced a lawsuit. You don’t allow the user to turn down the message notification. So if Apple could face a lawsuit and the user has the option of volume control, you could face the same because you don’t offer volume control.
You also still have the numeric keypad bug since v2 of the firmware. Try to use the number keys to open up allications without the blue control button. This worked fine in v1 of the firmware.