Not using the latest files caused the problem. Maybe I should take the reboot warning more seriously. $ locate .new D:/UNIX/cygwin/bin/bash.exe.new D:/UNIX/cygwin/bin/cygiconv-2.dll.new D:/UNIX/cygwin/bin/cygncurses-8.dll.new D:/UNIX/cygwin/bin/cygreadline6.dll.new D:/UNIX/cygwin/bin/cygwin1.dll.new D:/UNIX/cygwin/bin/cygz.dll.new D:/UNIX/cygwin/bin/libW11.dll.new D:/UNIX/cygwin/bin/rxvt.exe.new -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/