In my Nokia 5130 XpressMusic, the end/power button (RED Button) has stopped functioning suddenly a few hours ago. The button does not perform the 'end' function which is used to get back to the main screen from any menu.
Secondly. the # key does not perform the function of turning the phone to silent mode from general mode or vice versa.
Thirdly, while using the Music Player, the music suddenly stops while using forward/rewind/next/previous functions. After this, even if the 'Play/pause' button is pressed, it is of no use though the play/pause symbols on the screen change.