I reported this with report-emacs-bug, but I can't read newsgroups during the day (and I'm not aware of a mailing list that gets these), and I wanted to know if this was a known problem (I didn't see it in the bug list). After installing the beta (XEmacs-Cygwin) on 4/19, using the setup.exe installer, many things are quite a bit nicer than the released version. However, a very annoying symptom is if I press ^C^C in a shell buffer, it locks XEmacs. Every time. I have to kill the process. Ironically, the lack of the ability to kill simple "tail -f" scripts in NTEmacs was one of the main reasons I decided to try XEmacs-Cygwin.