[SLUG] Ubuntu 8.10 Ibex - annoying flashing in Firefox

[Sonia Hamilton <sonia@xxxxxxxxxxxx>]

I've recently upgraded from Ubuntu 8.04 to 8.10 (Ibex).

I've noticed that Firefox now has this annoying habit of automagically 
going into a semi-fullscreen mode, that causes Alt-Tab to flash nastily 
whenever Firefox is selected or passed over. Anyone having this problem? 
Anyone know of a fix?

A quick fix seems to be to take Firefox to proper fullscreen and back to 
normal window mode using F11 F11. But after a while Firefox reverts to 
"semi-fullscreen mode".

Sonia.