On 16/07/07, Daniel Arnold arnomane@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