After installing the win32myspell.xpi ( http://bugzilla.mozilla.org/attachment.cgi?id=63881 ) I find myself running across many bugs which have been moved to bugscape or marked invalid. I believe many of the bugs should be reopened. I'm not using the netscape backend, therefore the bug is in Mozilla.
Just a first pass... Some of these may actually be dupes of each other.
Not sure why, but bug 132697 was opened to bring code back from bugscape rather than putting it back into the original bugzilla bug (bug 83933).
If you want to spellcheck the subject line, that's bug 3459.
Ok my problem with the spellchecker is that when I start it it always goes to the beginning of the file and you have to reingore words you have ignored before. Also When running the spellcheck if you have a word that is fragmented and the spellchecker only hilites half of it you have to close the spellchecker to access the file with composer to fix the problem. ie you need to be able to click on the file in composer fix problem and then return back to the spellchecker and continue on.
I don't see how this bug is still useful, given that the set of bugs that can be described as "spellchecker issues" is the same as the set of bugs in the Core:Spelling Checker component. Please stop adding dependencies to it.