Captcha problem when wrong captcha is enterred.

[Ruud]

Hi WB lovers.

When I create a simple contact form with captcha enabled I have the following problem.
I fill out the form and fill a wrong (or none) captcha code.
Next I will get a page telling me the captcha was wrong, together with a "back" link (actually a go(-1) javascript).

When I go back using that link, the captcha is not refreshed. (FF displays the old one, IE7 displays a broken image)
The next submit (with a wrong or empty - or the correct old - captcha) displays an empty page with just the word "error".

If I don't use the "back" link but reload the page by clicking my normal menu, I get the page filled with all previous content and a fresh captcha.

I have had this problem on my sites on WB2.6.7, but also with WB2.7 RC1 and the brand new RC2.

Does anybody have an explanation why this is happening, and why I don't see this problem described on the forum more times?

Thanks,

Ruud

[BerndJM]

Hi,

I've never heard about this problem before, so I checked it just with some installations from 2.6.5 to 2.7RC2 -  no problem, all work as it should.
Think this is a problem outside WB, but where ... 

Regards Bernd

[marathoner]

Maybe browser caching??

[Ruud]

It happens on different browsers on different machines. So it shouldn't be browser caching.

I now suspect my testserver.
I disabled all caching on the server which is handy for testing CSS modifications, but for some reason I don't even see a call in my logs for a new captcha.

Because my problems with the captcha on my test platform I actually never use them on production sites.
So now I did a quick check on one of my production sites, and there it seems to work better. (2.6.7 - not refilling the fields, but it is generating a new captcha).

I am using SAMBAR (rip) server on a windows machine. I think I will have to start setting up a *nix server to get an environment that is better comparable with my production sites.

Thanks for your responses anyway,

Ruud