Delayed Dragon Age DLC Return to Ostagar has appeared briefly on Xbox Live before being pulled by developer BioWare.
According to BioWare's Chris Priestly, writing on the official forum, the problem this time is in a preceding patch.
"This morning a title update on the Xbox 360 for Dragon Age: Origins was made available in preparation for the release of Return to Ostagar," he wrote.
"This title update introduced a previously undetected issue that causes specialisation classes to not work correctly in Dragon Age: Origins.
"We are removing Return to Ostagar from Xbox Live until the issue is resolved and are recommending that you do not download the title update."
A fix for the title update issue should be available "as soon as possible", the developer added. Presumably once that's sorted we can expect to see Return to Ostagar made available on Live again.
It's not clear whether the Live issue will affect release dates for the PC and PS3 versions of Return to Ostagar, which takes players back to the scene of Duncan and Cailan's downfall near the beginning of the original game.
The DLC had previously been delayed after a problem was spotted at the last minute during certification.
BioWare is also working on an expansion for Dragon Age called Awakening, which is due out in March on all formats.