Whitney Houston, we still have a problem. So, why did the troubled diva check herself out of rehab after just five days of treatment, as the New York Daily News is reporting? Beats me, but her rep insists that Houston — who allegedly is staying in a rented crib near Atlanta — is "continuing the prescribed treatment, as was planned." Meanwhile, a little further north, Houston's hubby Bobby Brown began a 90-day jail sentence in Dedham, Mass., for failing to pay $63,500 in back child support for two children he fathered with Kim Ward. In court, Brown broke down in tears as his attorney explained that his client couldn't fork over the cash because he was unemployed. I hear there's an opening on Surreal Life 3...