The buttons of #fbToolbarInner disappear when switching to the Console Panel (FB 1.12)

With Firebug 1.12 beta 4, the buttons of #fbToolbarInner (Clear, Profile, Persist, etc.) disappear when switching to the Console Panel.

Steps to reproduce: 
1. Install Firebug 1.12b4 + Acebug Editor
2. Restart Firefox
3. Enable Firebug on this page
4. Enable the Console panel, refresh
5. Switch to the HTML panel
6. Switch back to the Console panel
   |=> no buttons of #fbToolbarInner

This is due to the use of the strict mode in Firebug + the use of arguments.callee.caller in aceEditor.js.

You'll find attached a fix. Don't hesitate to modify it at your convenience. Hope it will help!

Florent