Hello,
Is this problem browser dependency ?
IE 6.0 SP2 and Firefox 1.5.0.1 succeeded, but Opera 8.53 failed every time.
Tested right now with these browsers (same versions) on two types of Internet connection. All three browsers worked fine.
And I tried again just for the fun of it, of course not using the SSL version... again, nothing but troubles:
...
Is image with letters changing on each reload of page? Try to force reload (CTRL+R or CTRL+F5) page before submit of form. Force reload should invoke new download of all items on page even if some are cached.
Actually I never tried small letters, just because all codes are in caps anyway.
It has nothing to do with what kind of letters you are trying to enter...
Letters are lower-cased by script itself before operating with them, so it is not problem to write letters in caps or not.
What I believe it has a lot to do with (maybe) poorly created page, and also with different types of internet connection. Firewalls too ? Who knows...
Page is working for a lot of people every day, so I think page is created OK. I am personally suspecting type of connection, exactly handling of HTTP traffic by ISP, maybe your ISP is using some (transparent) proxy server, which is caching/serving wrong image.
Why is it working with SSL, I have no clue...
There isn't implemented CAPTCHA protection on SSL form.