Trying to save a file with a / in its title fail, because the default proposal
for the page
filename is the the title.

To reproduce, open the following webpage:
http://wiki.debian.org/qa.debian.org/FTBFS
then try to save it using CTRL-S. Clicking on the Save button does nothing at
all; possibly
(wild guess) because an underlying error on invalid filename is caught and
hidden away.

Regards,

Thomas