Uncollapsing the new comments' parents wasn't working correctly if there
were several new replies in a chain. Because it's working from the
"leaf" comments back up towards the root, doing a continue when a
comment's state had already been set would cause uncollapsing parents to
fail - the deepest comment would uncollapse its parent, then its parent
would get skipped. If the parent was also new, this would mean that
*its* parent didn't get uncollapsed, even though it should have been.
Deimos