An intruder broke into Sandra Bullock's home early yesterday—and the actress was home at the time, along with her 4-year-old son. Law enforcement sources tell Today that suspect Joshua Corbett, 39, may have been obsessed with Bullock and kept a diary about her. He allegedly rummaged through her belongings before police responded to a call about a prowler at 6:30am and arrested him on suspicion of burglary. Bullock "is unharmed and she is fine," her rep tells People. (More Sandra Bullock stories.)