About 500 copies of “Rebirth” — which has received six different release dates starting April 7, 2009 — were last month mistakenly shipped to Amazon customers who pre-ordered the album. Inevitably, it leaked on the Internet.

Consequently, “Rebirth,” which will be available just a week before Lil Wayne is sentenced in New York for possession of a weapon on February 9, is now said to include all new tracks, according to Mack Maine, the president of Lil Wayne’s Young Money label, who last month tweeted: “Leaked 09 Rebirth isn’t going to be 2010 Rebirth.”