According to MTV.com,

Rapper Lil Wayne will not be released today because his time was miscalculated. Here’s more from the correctional officers statement to MTV:

“His time was miscalculated. He owed, he owes one day of ‘good time,’ so it’s gonna be another night,” Officer Caraballo said Thursday as MTV News awaited the New Orleans lyricist’s release outside the rapper’s jail. Caraballo added that “good time” is reduced when an inmate runs into trouble behind bars. “If you get an infraction in jail, they’ll take away ‘good time’ — time that you accumulated for good behavior.”

Our guess is the incident that occurred back in May when Wayne was found in possession of an MP3 player and headphones could have been an what pushed back his ‘good time’.

But as always, we will keep you posted!