When I right click on the spelling mistakes in the div, I get a
context menu with suggestions. When right clicking on the spelling
mistakes inside the textarea, I don't get any suggestions, because
InlineSpellCheckerUI.overMisspelling (at least in my xulrunner test
app which has the same behaviour) returns false.
Setting contenteditable to false re-enables suggestions in the
textarea. With that in mind, I have found the following workaround,
(which is used on a page with many textareas and many contenteditable
Some background: I am working on an xulrunner based app, so any patch
which can be applied to xulrunner or my browser.js code would be much
appreciated. This does seems to be a bug in spell check itself.