Very often discussed here... The PATH_INFO problem. We found a solution / work-around for this.

Check this message:

http://www.concrete5.org/community/forums/installation/using_reques...

I think this issue should be really fixed in concrete5. Concrete5 does not work correctly if PHP is executed via FastCGI.

If someone or the developer team is interested, I can send you login data to our test / demo server for free.

Anyone interested in helping us to fix that issue?

Just write me a message and I provide you a demo account on a correct configured server running PHP as FastCGI.