The links have clarified it for me, old message, full release. The BBC has gotten their hands on the earlier tape and translated it in full. What concerns me is that it has been making recent rounds in secure jihadi internet circles.
MEMRI.org - Special Dispatch Series - No. 989: "Al-Qaeda Deputy Ayman Al-Zawahiri Claims Responsibility for the London Bombings, Discusses Elections in Afghanistan, and Declares: 'Reform Can Only Take Place Through Jihad'" (ARTICLE SNIPPET: "The following are excerpts from a video featuring Al-Qaeda deputy leader Ayman Al-Zawahiri, which aired on Al-Jazeera TV on September 19, 2005. TO VIEW THIS CLIP VISIT: http://memritv.org/search.asp?ACT=S9&P1=856 ") (September 20, 2005)