Double click is not working on system folders

Hello guys.
I have enabled the option ‘show system files’ so that I can see system forcers and files.
For example now I can say /usr folder although it is greyed out.
The problem is that double clicking is not working in these system folders so that you can access them.
Any ideas?
Thank you.

Yes, you are right. I have just tested it here with basic Finder under 10.9.3 system.

A workaround could be to use the keyboard shortcut for entering a folder CMD+DOWN_ARROW. I’m sorry I’m not going to fix it at this point.