A trivial bug in zsyncmake that crept in with the changes for 0.2.x was reported, and this version fixes it. It will not segfault on files smaller than one block anymore (not that there's much use in partial file transfer if your file is only 1 block!).

This version also includes a new optimisation for locating matching blocks. A "negative" hash table is now used to speed up processing of non-matching sections in files. This puts zsync in the lead over rsync (which, it seems, does not have an equivalent optimisation) in speed in my test setup. It also makes smaller block sizes for ISO files practical.