My phone got the update to 5.0 a little while ago (Virgin mobile phone, Telstra sim, Australia), since then I have had the blocks (in place of numerals and letters on the unlock keypad and some letters elsewhere on the lock screen) you see in the screen shot below, but I also lost the ability to pause and play music from the lock screen. I can fix the blocks for a few hours by rebooting the phone, nowhere in settings can I find out how to bring the music integration back to the lock screen, any help appreciated.