Adoucette - unfortunately, this problem with Captcha is a core issue rather than something which is being caused by the Feedback Module.
I traced it through the code and can tell you how to resolve it but it does require a recompile of the URLRewrite module.
If you think you can do this, then here are the steps:

a) Open up URLRewriteModule.vb (located under DNN455\Library\HttpModules\UrlRewrite) - I believe there is a project reference already to this if you open up your DNN 455 solution.

b) Scroll down to Line 348 where it reads If strURL <> "" Then

c) Change this line to the following
   If strURL.ToLower.Contains("captcha.aspx") Then
         'Don't do anything since this is a captcha URL
   ElseIf strURL.ToLower.StartsWith("https://") Then
        ' redirect to secure connection
        Response.Redirect(strURL, True)

The rest of the block should be left as is. That is to say the main change made is that you check for captcha first and then check whether the url starts with "https://"

I have tried this with my copy of 4.5.5 and it is working as expected. I am sure the core is aware of this too and will probably be fixed in the next release as it becomes available.

Once you've made these changes, remember to recompile.

thanx for the code,

but do you mean something like:

                    If strURL.ToLower.Contains("captcha.aspx") Then
                        'Don't do anything since this is a captcha URL
                    ElseIf strURL.ToLower.StartsWith("https://") Then
                        ' redirect to secure connection
                        Response.Redirect(strURL, True)
                    Else ' when switching to an unsecure page, use a clientside redirector to avoid the browser security warning
                        Response.Clear()
                        ' add a refresh header to the response
                        Response.AddHeader("Refresh", "0;URL=" & strURL)
                        ' add the clientside javascript redirection script
                        Response.Write("")
                        Response.Write("")
                        Response.Write("")
                        ' send the response
                        Response.End()
                    End If

If you mean something else, is it possible that you provide the specific segment of code (the complete if-else-endif statements concerning this bug fix?

regards

Since this seems to involve re-compiling a core module (and I'm not capable -- or don't know how -- to do that), would one of you two be willing to email me the module -- if you end up compiling it for your own use?

Or, is there a standard way of getting updated core modules from a DNN CVS or module repository that I don't know about?