Vincent> I can reproducibly generate a crash when editting text Vincent> inside math mode $$ and entering a close bracket \}. A Vincent> sample is provided below. I don't know the details of Vincent> how xemacs was installed, but the people at Vincent> help(a)phys.psu.edu would know. If you are using XEmacs 21.1 (recently retired) or 21.4 (current stable), please use M-x report-emacs-bug to generate a report. This includes a lot of information that the (now-deprecated) gnats interface does not. If you are not using XEmacs 21.4, you should encourage your admins to upgrade. Crashes should not happen at all, and disabling a feature is not really a satisfactory remedy. However, it is very unlikely that a solution will be provided for older versions of XEmacs, as the bug has very likely already been fixed in new ones. One possibility is that you are crashing in the regexp code. This is a long standing bug which users can address by increasing the stack space available to xemacs, typically by using a shell command such as "limit" or "ulimit". 8MB should be plenty. -- Institute of Policy and Planning Sciences http://turnbull.sk.tsukuba.ac.jp University of Tsukuba Tennodai 1-1-1 Tsukuba 305-8573 JAPAN Ask not how you can "do" free software business; ask what your business can "do for" free software.