We've just run across a problem I haven't seen before. When you have a page with a mail form, you can't save comments – the Save button (for a new comment) appears to be enabled, but nothing happens when you click it or Cancel. (Preview does work.)
I don't see any JavaScript errors.
When I look at the page source, it looks to me like the </form> tag for the mail form is missing or misplaced.
It seems like this was introduced recently – we've got a comment from June 23 on a page with a mail form.
We're on Confluence 5.5 and Mail Form NG 4.0.3. (I think we were still on 5.1 June 23, so it looks like the upgrade might be causing this.)
Anyone else see this?