1 File => Create Document => Empty File 2 Enter the file name "%S" or "%s" 3 click "Create" button The Thunar window disappear quietly. copying files seams have same problem too.
Addition info: I am using Gentoo amd64, just emerged xfce 4.8 from portage. my file system is ext4 and LANG=en_US.UTF-8
Fixed in master and the xfce-4.8 branch: commit 1d4dfafda30df071d7c1e0b370f0613cbc92ba74 Author: Jannis Pohlmann <jannis@xfce.org> Date: Mon Jan 24 20:06:35 2011 +0100 Don't interpret file display names as format strings (bug #7128). This avoids a segmentation fault when creating files like '%s' or '%S' using File => Create Document => Empty File.
BTW, this fix should also fix the same issue with copying.