I have the same one as @justmemory. I downloaded it to compare, and they match size (475223929 bytes, ~454M) and sha256 checksum (6304adb6d6fac2a8beba5ed0085859fa0f84444fc8e84241e 0340c3a4f203b77).

Note that inside of the tar, in INSTRUCTIONS.TXT it refers to itself as pwnphone_image-7.3.2011.tar.gz.

So note the "7.3" as opposed to the "7.6" you want..