Item-to-Item predictions generated only for user 4

I updated the sql from:

function fivestar_rec_run_recommender() {
$sql = "SELECT uid, content_id, value FROM {votingapi_vote} WHERE content_type='node' AND value_type='percent' AND tag='vote' AND uid<>0";

to

function fivestar_rec_run_recommender() {
$sql = "SELECT uid, content_id, value FROM {votingapi_vote} WHERE content_type='node' AND value_type='percent' AND tag='vote' AND uid>0";

This fixed the problem.