'Home' breadcrump kicks out of the site

Hi
I'm having an issue with the 'home' link in my site breadcrump line.
Sometimes, when pressed its kicks the user back to the login page.
Since I use 'front page' module as an lending page for unregistrated user, its quit annoying for logged user to find themselves back in the login page.
Very important thing is that there is no logout prosses - in the "enter site" is pressed, even without user name and password, its takes you back to the site homepage (i.e "www.mysite.com/?q=").
thanx

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