it's safari on mac os x 10.3... instead of overwriting downloads it increments
the names:
MD5 (linux-2.6.1.tar.bz2) = fa82d1e4be518261b2eeb78eabf9cca7
MD5 (linux-1-2.6.1.tar.bz2) = fa82d1e4be518261b2eeb78eabf9cca7
MD5 (linux-2-2.6.1.tar.bz2) = fa82d1e4be518261b2eeb78eabf9cca7
sorry