recently downgraded from ff 7x back to 3.6.24. all tabs are at top, where i want them. but when, for example, i click on an option like, "ask a new question," that tab also appears on the bottom of the page, in a separate line, beneath the quick launch bar. this occurs with any web site, e.g., nytimes [my home page], selecting a story results in two tabsl, one at top, and one below quick launch.

your advice is appreciated. thanks.