Comment 13 for bug 474397

I think effell has hit the nail on the head, although I am getting slightly different numbers for the locations of the corrupt regions:-
0x0f38-0x0fff (inclusive)
0x1e70-0x1f37
0x2da8-0x2e6f
i.e. The first 200 bytes of the file are overwriting the original data at intervals of 3896 bytes.
This is almost certainly an error in obexd's "Resizing stream chunks to 3896" (from 4096).

See also:-
http://bugs.gentoo.org/297624
Perhaps this was first noted in October 2008:-
http://article.gmane.org/gmane.linux.bluez.devel/16186

Cheers.