On 21/07/2012, at 08.14, Guido Governatori wrote:
Suddenly spell checking (check as you type) stopped working.
You can toggle this in Edit → Spelling. Are you saying it no longer marks misspelled words?
Then it might be because you changed language grammar. For example in HTML the <tags> are exempt from being checked. The status bar show the current language grammar used (and allow you to change it).
Also check spelling behaves in a strange way. I have inserted a misspelt word, I have clicked on it, and corrected it. Then I run Spelling -> Show spelling and grammar. In the dialog I see the word I have already corrected.
I think this dialog just show the last word operated on.