The "capcha" on wiki.dovecot.org seems to be double-escaping HTML entities in the informational message, such that the wiki displays "Captcha to prevent wiki spam, write <strong>Dovecot</strong> here:" [sic.] When I dutifully entered "<strong>Dovecot</strong>," it didn't work, saying "<span class="error">You didn't provide the correct captcha. Use the browser's Back button and try again, or register an account to avoid this.</span>" [sic]

It took a few minutes for me to realize what was going on and simply enter "Dovecot" for the capcha...

-- Ben Winslow <rain@bluecherry.net>