Not sure if this is expected behavior or not as a result of the upgrade, but I've been having trouble logging into the site all week, frequently receiving "404 not found" errors. Today, I cleared my browser cookies for this site, but had the exact same issue logging in. It seems like if I navigate to the forums (https://community.gaytorrent.ru/) and login there, I have better luck and can then go back to the torrent search page. If I try to login from the torrent search page, it gives me the 404 nearly every time, though refreshing the page enough times will eventually get it to work. I've tried Firefox and Chrome with the same result and my Internet service is working fine otherwise (it's Verizon FIOS Gigabit).
I also switched to the beta search page (https://www.gaytorrent.ru/search.php) and it takes a lot more vertical space than the old search page (https://www.gaytorrent.ru/browse.php) 5 results versus 9 results in the same browser window height, so there's a lot more scrolling involved to go through each page of results. I definitely appreciate modernizing the forum, but feel that a smaller font and less margin / border around each row to get closer to the density of results on the old results page would be an improvement.