I had the old site bookmarked and when they migrated I just got error 404
After days I decided to track the place down and found it again.
Just a heads up if there is a sudden lack of traffic on the site.

Thank you for the information.
I've just upgraded the CMS and the forum plugin. The old one was too difficult to moderate due to several bugs.
But I believe that the error 404 problem comes from the URL rewriting.
The new url's are different which is the problem.
I will double check if the old ones could not be imported within the new site..
A few hours after the rollover the web site was flooded with spammers. (no captcha in the registration module)
Now it looks OK.

When I've setup the forum, I've used the existing SEF module to generate Search Engine Friendly url.
Since that time the SEF module has changed a lot and is producing better formed URL's.
So I've decided to use the newly generated ones.
Google will have to crawl my site to update them.

But I've seen that the old URL returned by Google are still forwarded to the forum on the Home page instead of the searched page.
Sorry for that.

We'll see how long it will take for Google to update its database.

Nevertheless, when I see that there are sometimes 140 people on the forum, I think the update will be fast.
If I flush the SEF URL cache, it takes only a few seconds to regenerate hundred of new URL's

tried to delete some pm in the outbox and get this.

The page isn't redirecting properly
Firefox has detected that the server is redirecting the request for this address in a way that will never complete.

Thanks for the bug report.
Bug tested, incorrect Ueddim redirection.

I've fixed it.
It was a wrong url rewriting as UeddIm PM mailbox is not natively supported by the SEF module.
As it's really not necessary to let Google see nice url's for the PM mailbox, I've disabled the url rewriting for UeddIM.
Thanks again.

BTW, if you use also IE9, could you check if you can see the BBcodes formatting toolbar and can use the emoticons when replying to a topic
Under Firefox I've no problem, but under IE9 the formatting bar is absent and cannot use the emoticons.
According to the Kunena team this bug was supposed to be fixed.
(BBcodes are available only when IE9 is running in IE8 compatible mode.)

I am also facing such errors in my website.By reading your post I got my solution.Thanks for getting me out of trouble. :

Don't forget to cleanup/flush the already generated SEF url.

I use mac osx firefox 3.6.24,actually osx86 multiboot to avoid virus/trojan woes.