The current registration question for the forums is What is the output of "date -u +%W$(uname)|sha256sum|sed 's/\W//g'"? and for the wiki What is the output of "date -u +%W`uname`|sha256sum|sed 's/\W//g'"? so I guess the wiki is csh-friendly. The code breaks in the first week of the year. Old forum thread: https://bbs.archlinux.org/viewtopic.php?id=132824 New forum thread: https://bbs.archlinux.org/viewtopic.php?id=152460 Allan suggested a fix, but it hasn't been implemented: https://mailman.archlinux.org/pipermail/arch-dev-public/2011-December/022296... I can open a bug report for this, but there are also ideas how to make it easier for people using other shells or non-Linux systems, e.g.,: https://bbs.archlinux.org/viewtopic.php?pid=1151464#p1151464 There already is https://bugs.archlinux.org/task/32066 open.