Tabs issue NIS 2009, Firexox 3.0.5 and Norton Toolbar

Hello,

 

When I have the Norton Toolbar enabled, the tabs in Firefox do not focus correctly.  For example, if I open a new tab, and click a link, or enter a web address it always opens in the previous tab.  Sometimes if I have a particular tab open, and I hit the back button, it will go back on another tab instead of the one I want. 

 

When I disable Norton IPS and Norton Toolbar, the tabs work correctly (i.e. link or address will open in the newly created tab).  I do have the Tab Mix Plus addon also, but I want to keep it.

 

How can I fix this?