A coworker of mine was just telling me yesterday that her cat used to pee everywhere - on the floor, on the bed, on other furniture... the vet said it was behavioral and never did any tests... until the poor thing got sick and then the vet thought to check for diabetes. Lo and behold, the kitty had been suffering from diabetes for YEARS and by the time he showed any symptoms other than peeing outside the litter box, he was in renal failure and passed away the next day.

Take your baby to the vet. Have tests done for UTIs and diabetes and any other medical problem that peeing outside the box could mean.

Good luck.