User Agent: Mozilla/5.0 (X11; Linux i686) AppleWebKit/534.34 (KHTML, like Gecko) rekonq Safari/534.34 Steps to reproduce: After upgrading to Firefox 9.0.1 not long ago, I've noticed a bizarre problem with the spell checker that I can't resolve. So I am reporting it. Happy to provide further information about this. Actual results: I am experiencing an annoying problem with Firefox (Version 9.0.1, Kubuntu Natty). The spell checker is not working properly. For reasons I don't understand, it is defaulting to Australian English. If I right click in a text box, go to Languages, and try to change the language from English/Australia to English/United States, it only stays in effect for a few seconds. Then it switches back to English/Australia. Since I have been unable to stop Firefox from doing this I have tried turning off the spell checker. But when I've done this, it has later turned itself back on without my consent, again defaulting to English/Australia. Expected results: - Unchecking "Check spelling" should turn off the spell checker. It should stay off until the user reenables it. - The user's choice of language/dictionary should be respected. If the user changes the dictionary, the change should remain in effect and not be reversed.

Mozilla/5.0 (X11; Linux x86_64; rv:10.0) Gecko/20100101 Firefox/10.0 Is this a Firefox build (e.g mozilla.org) or a build that comes with your distribution? I've added the English Australian dictionary in 10Beta6-I previously had the US one. This is how it works for me with two dictionaries(on mail.yahoo compose page): any modified setting remains selected until reloading the page. After reload the default settings remain selected-Check spelling selected and US Dictionary. Not very sure about the normal behaviour here, I don't use this on a weekly basis, though.

This is the build of Firefox that comes with my distribution (supplied by Canonical).

Now using Mozilla Firefox 10.0.2 (supplied by Canonical). Still experiencing this problem (dictionary switching back to English/Australia), although it happens less frequently than it did a few weeks ago. I'm at a loss as to why this happens. I'll be typing text into a form field and words like "favor" or "honor" will be underlined in red because there's a missing U according to that dictionary. I keep having to change the language to English > United States.

Most likely fixed by bug 717433. For more details see meta-bug 1073827 comment #33.