Disallowed Key Characters when debugging

[eluser]pzntec[/eluser]
It's odd because I ONLY get this error while debugging through my IDE.

To answer your question, my config file already contains the same regex as you suggested, by default. I have never touched it.

This might be a bug, I'm not sure... But I can work around it if I comment out the line 731 inside the core/Input.php file.