Media 7.x-1 Library tab empty All of the sudden my media library tab becomes empty. I check the permissions and everything seems to be fine.
It looks like when I updated the jquery update module I checked both administrative  and default version to use jquery 1.7. There is a known issue here jQuery Update 7.x-2.4 makes Media 7.x-1.4's Library tab empty. When I changed the administrative pages to use 1.5 everything was ok again.