[imp] Use of Back Button in IMP & Vanishing Left Nav

[Brian Leggee]

   Sometimes (but not always) when I use my Browser's Back button  
(Firefox) in IMP, the Left Nav Side-bar vanishes, and the only way I  
can get it back is to log off & back on.

   Does anyone have a fix for this, or do I just need to "not" use the  
back button?

   This usually happens when I am perusing theu emails, and I am  
looking at an email, and want to return back to the 1-liner list of  
emails. Maybe there is a better way to do this.

   Help anybody !!! Thanks in advance.