I have a problem with the toolbar within Opera, (and probably other browsers as well). Whenever you open up Opera for the first time the olbookmarks toolbar redirects to the login page. This means that if you have several browser windows open at the same time, (not just pages), then for every window you get presented with the login box.
If the login page was the same page, (in this case http://localhost/tools/rbm/toolbar_index.php\), instead of a redirect to the login page, then all you would need to do is login once, and simply 'reload' any other toolbars, (or windows), that have the login prompt.
Snapshot of login prompt.