Hello
Thank you for your perfect answer! This is very interesting and now I know officialy the problem is realy due to X-Cache.
Also, I have downloaded the new Visforms 3.5.4 Beta (before, I was on the 3.4.3 version) because I would like customise my captcha.
But I found a problem: when I click on "Submit", I am well redirected to the page (the Visforms message, and not a custom link) but the page show "
Form is missing" (Note: the mails are well sent).
I corrected it by replacing the line 245 from the file "components/com_visforms/controller.php" by :
Code:
$this->setRedirect("index.php?option=com_visforms&view=visforms&layout=message&id=".$visform->id.$tmpl);
So, do you know why Visforms display this error if I use the original Visforms 3.5.4 Beta ?
Thank you