They have done a number of updates lately as you know. Mine works perfect. Did it go bad after one of the latest updates? are the time and date correct on your phone?
/** SGS3 (rooted & stock ROM) **/
/** Asus Prime TF201 (rooted & mildly OC'd) BRICKED BY THE ASUS OTA JB UPATE!**/
/** OG Droid (rooted & OC'd & all hacked up) **/