With a new cygwin install, subversion 1.4.6-1 dies on execution. Under
XP, it silently exits. Under Vista, it launches the "This program has
stopped working" dialog. This doesn't happen with a machine upgrading
its version of cygwin, only on a new install. I've verified this by
wiping a cygwin installation where subversion 1.4.6-1 worked and
reinstalling cygwin.

Perhaps there's a missing dependency with the new package?

cygcheck output attached.