[Problem with request parameter]

Hi All,

I am experiencing a very strange problem on our jahia platform.

Some request parameters seems to be kept on server each time a page is
delivered. 

It causes two distinct problems on the web site:

-          I have a form which is meant to select few parameters to display
projects according to selection; each time I made a search, any other user
on the web will not have the search form on the same page but instead the
result of the last search done.

-          This problem may have an impact on another part of the web site :
the secure area of the site, which after login from one computer, each
'secured' page is viewable by anyone on the web till session expires

 

The only way to return to a normal state is to flush the HTML content cache
in jahia administration interface

 

Anyone has an idea on how to solve my problem?