The moving of comments, as such, works perfectly! Thank you very much! But unless I'm missing something, if you have a larger site with hundreds of posts, it's a nightmare to actually find the one to which you want to move the comment, in the drop-down menu. Even just an option to display the posts sorted either alphabetically or by date would help a lot. Although a search box, similar to the one used in the WordPress "Add link" dialog, would be ideal.