Weird character showing up at the top left corner of FreePBX

There’s a weird character showing up in freepbx at the top left corner in the recording page. Does anyone know what this is? Have I been hacked?

Also, the /panel link which should show the FOP panel, comes up with page cannot be displayed.

Running Freepbx and asterisk on CentOS5.4

Does anyone know what that character is?

Have you edited any of your files with vi ?

No, nothing…