For some reason I have suddenly lost usual access to my SD card. So, the lists in the music app are empty, as is the gallery. I've just updated to 1.3.11 but there is no difference. I have tried another SD card and the same problem occurs. However, if I go through File Explorer I can access the SD files (music tracks etc). This has only happened in the last couple of hours, it seems really weird as I haven't made any changes to my phone that would affect the files system/SD card.