Comment 6 for bug 280484

User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.0.8) Gecko/2009032712 Ubuntu/8.10 (intrepid) Firefox/3.0.8
Build Identifier: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.0.8) Gecko/2009032712 Ubuntu/8.10 (intrepid) Firefox/3.0.8

Gnome panel disappears when visiting the link below:
http://blog.oup.com/2009/03/science-fiction/

Reproducible: Always

Steps to Reproduce:
1. Visit link: http://blog.oup.com/2009/03/science-fiction/
2. Enjoy the view (no panel, menus, taskbar)
3. Switch to another tab / application if you want your panel/ taskbar back.
Actual Results:
Gnome Panel [menus & taskbar]disappeared.

This could be a security problem. Seems that Firefox allows application to switch to "full-screen" mode from JS, and GNOME menus and taskbars are going "off-screen" in the process.