On 16/07/07, Daniel Arnold <arnomane(a)gmx.de> wrote:
At my first attempt the right graphical captcha was
"veryours" but it clearly
did read as "veryaurs" (which I typed wrongly in and so got the error,
although I knew that this was strange English). The little "o" definitely was
displayed as a little "a" (the right side was strechted to a sharp vertical
line, like in a real "a").
No doubt this is a side-effect of the graphical manipulation used to
skew words to help make the CAPTCHAs themselves more robust.
So it is no surprise that en.wikipedians do make less
failures on english
captchas with undefineable letters.
Could be worse, at least those users aren't blind or reliant upon a
device to help them read the page; such people have no hope whatsoever
of passing a CAPTCHA.
I hope you can track and maybe solve the problem now
(people bug our
Wikmedia-OTRS quite often with captcha problems).
Not sure what the best solutions might be. I suppose if we had another
CAPTCHA generator script, we could start generate different-looking
images, which might help the situation.
It might be possible to blacklist certain combinations of letters in
the words selected for CAPTCHAs, but this might not be feasible.
Rob Church