The latest version of UPX (3.03) adds support for the LZMA compression. This can prove to be more efficient for large binaries, but it's less tested. That why I compiled two version of UPX, with and without LZMA. As usual, both Tiger (10.4, PPC and Intel) and Leopard (10.5) are supported.

UPX 3.03 without LZMA support : click here .

UPX 3.03 with LZMA support : click here.