Idea + Zend Server = Small problem while debugging

I'm using Intellij Idea 11.1.1 on a MacBook Pro with PHP Plugin v117.222 and I have installed Zend Server 5.6 (Community Edition); I read your documentation on the JetBrains Blog about PhpStorm and I'm trying to enable debugging on Idea through Zend Debugger. So far I almost managed it to work, but I'm still missing something important.

I created a new server under Run -> Run/Debug Configuration -> Server -> Add with those parameters:

Host: localhost
Port: 10088 (the default Zend Server port on my computer)
Debugger: Zend Debugger

If I simply try to "run" it, it works without any glitch. But when I try to debug a simple application from Idea, it opens this URL inside my default browser:

http://localhost:10088/<project folder>/index.php?

start_debug=1&send_sess_end=1&debug_start_session=1&debug_session_id=11276&debug_port=10137&debug_host=192.168.1.100%252C127.0.0.1

And inside the browser I see this error message:

"Cannot resolve host 192.168.1.100%C127.0.0.1"

But if I change the "debug_host" parameter removing "%C127.0.0.1", it works. I simply change the URL address into:

http://localhost:10088/<project folder>/index.php?

start_debug=1&send_sess_end=1&debug_start_session=1&debug_session_id=11276&debug_port=10137&debug_host=192.168.1.100



Could you help me and tell me what I could do in order to change the "debug_host" property ?

Thank you very much and best regards