Slight delay as a result of an 'unforeseen bug'.
Kotaku reports that the Midnight Club: LA South Central DLC expansion has been delayed on Xbox 360. The new content went live as planned on the PlayStation Store yesterday.
According to the Kotaku report, the Xbox 360 version of the DLC has been delayed "slightly" because of an "unforeseen bug in the title update". Rockstar is working its hardest to ensure the problem is resolved as quickly as possible.
The South Central DLC expands the Midnight Club game world by around a third, featuring new vehicles, parts, music and much more. The map expansion is free, while all the new stuff to do in the new areas will set you back £7.99/800 MS Points.