See my response to P24592558 here, sounds like this problem has been re-introduced. http://ggnbb.glu.com/showthread.php?208984-Level-150-not-going-for-word-or-receiving-gold&p=463727&viewfull=1#post463727
It's been awhile for most of us, but that problem has plagued many players from the very start and it always seems to happens around Level 150. I want to say that the progress bar and the number of XP earned are out of sync and that you can play through it; it will correct itself.
another weird thing happens to me. I know! I got stuck at the end of lvl 150. I only need less than 1/10 bar of xp to lvl up to next lvl but it seems I just stuck at that less than 1/10 bar. I already fought 4 missions and each has 490xp. But still can't fill up that xp bar. Anyone know why?