Error page templates now supported
Hot off the press: Textpattern now supports error page templates.
The upgrade code will automatically create a new page template, “error_default”. This will be used to display error pages. The new tags <txp:error_status /> and <txp:error_message />, when placed in the template, will include the error code (“404 Not Found”) and message respectively.
If a template matching the error code is found (“error_404”, etc), that will be used as the template. “error_default” is used when no matching template exists. If “error_default” is missing, or if the database is unavailable for some reason, a hard-coded page will be used as a last chance fallback.
The code is in the 4.0 development branch, and will be included in the next release (4.0.2).

Also see subversion vs. releases.
— Sencer · Sep 23, 12:01 PM · #
— Ivo Toman · Sep 23, 12:36 PM · #
— Maix · Sep 23, 04:30 PM · #
— Stuart · Sep 23, 06:08 PM · #
And it works great!
— Kjell · Sep 23, 06:15 PM · #
— Julian · Sep 24, 02:17 PM · #
— Alex · Sep 24, 03:00 PM · #
— David · Oct 3, 02:24 PM · #