In Nov 2013 I reported about the bug: Wrong anchor on "edit" button? (q_doedit) (not implemented in core yet)
Now I have realized that after editing a comment and hitting the Save button the anchor is set wrong as well, instead "#c"+$commentid we have "#q"+$commentid.
To solve this:
In qa-page-question-post.php find line:
qa_page_q_refresh($pagestart, null, $commentparenttype, $comment['parentid']);
qa_page_q_refresh($pagestart, null, 'c', $comment['postid']);