Please remove the current 2.4* and replace with this one. It should fix an important Cygwin bug[1].
wget --recursive --no-host-directories --cut-dirs=3 \ http://cante.net/~jaalto/tmp/cygwin/bzr/bzr-2.4.2-1-src.tar.bz2 \ http://cante.net/~jaalto/tmp/cygwin/bzr/bzr-2.4.2-1.tar.bz2 \ http://cante.net/~jaalto/tmp/cygwin/bzr/setup.hint Jari [1] https://lists.ubuntu.com/archives/bazaar/2011q3/thread.html#73590