Since that is when the trouble started, it is pretty safe to assume the problems lies with that.
That said, I have a problem believing this is difficult to fix.
I mean, I have changed domain names and close to everything many times, but never had trouble like this.
But there is obviously something going on, since your
GoogleMaps Key is also asking for a change.
Which is kind of strange, as this is just a string code. If the site
name has changed, then this will dislodge the Key of course.
And thinking on those lines, if you have changed the base Comments template, complete with some hardcodes, then some things might be pointing wrong.
But, this is just speculation... and ideas on where it might be smart to look.