GNU Emacs 18.104.22.168 (i386-mingw-nt5.0.2195) of 2007-02-24 on LENNART-69DE564 (Lennart's unpatched version)
I use "occur" on big (> 100 MB) text-files quite often. While doing the very nice filtering, emacs regularly, but not always, output a message about the undo-information that prompts me to give it a yes or no aswear. I cannot exactly remember the wording, but yes means "yes, go along and drop the ability to undo the changes in the *occur* buffer".
Could this kind of behaviour be avoided? I can see no occasion when I would like to undo in an *occur*-buffer.
I have been using the cvs-versions for quite some time and this is not new.