Now, this:

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This "copy" is a really good idea. Good job!

Another small issue I found link to last post . Works great ?topic_id=13&posts_page=1#post-65 right? But it's not, and here is why.

When I was creating this I stumble upon same issue, I could not figure out how to apply posts_page=.

So, back to the issue ?topic_id=13&posts_page=1#post-65 will work, but you will not be on #post-65, you will be on first post on page #1. Because post-65 is on second page, therefore link sopose to be ?topic_id=13&posts_page=2#post-65

And remember me checkbox does not save cookies. When I close browser I have to relogin. Maybe it's getting saved as session, which is not good.