I was trying to register to the wiki in order to add some comments in the "discussion" section of a page where I thought my input might be relevant.
But it's impossible, both of FFx 7.0.1 and Chromium under Ubuntu 11.04
When I press "register", I get back to the registration page, with empty fields, and no error message. I don't receive a confirmation mail. I tried different inputs, leaving "name" empty, checking or unchecking "remember my session", etc.
My contribution was not going to be that important, but you might want to look into that problem.
Good day to all.

xananax wrote:(…) but you might want to look into that problem.

The issue affected existing accounts as well (login only worked with IE) [1], but has been addressed (at least logging in works again since earlier today).

[1] inkscape-devel: Re: Wiki log in failure