The firmware update seems to have broken my Bittorrent client. Torrents never download, and yes, I have checked and rechecked the settings on all my hardware (which has not been touched for literally months anyhow), and of the Bittorrent client itself.
I see this message in the log every time I add a torrent:
[09:11:27] JS error: [778] Uncaught TypeError: Cannot read property '262' of null