[quote="newborn"]
does it change something with DHT on or OFF

http://en.wikipedia.org/wiki/Distributed_hash_table
https://bugs.launchpad.net/qbittorrent/+bug/987340
[quote="shank"]
the torrent will stay in a "stalled" state. I then have to close and reopen qBittorrent to make it start downloading the torrent. Is this a known issue? [/quote]
Check comment #6 in link #2 above.
[/quote]
I did come across that issue on the tracker and I don't think it's the same as what I'm experiencing. My issue isn't happening with magnet links. It happens with torrent files. I just did more testing and used 3.0.0rc4 which gave a little more feedback which should reveal the issue with opening some torrent files in qBittorrent:
In 3.0.0rc4 when I click the torrent file link in Firefox and choose "Open with qBittorrent", qBittorrent now throws an error that says "torrent file does not exist". The same behavior happens if I locate the torrent file on my hd and double click it. If I rename the file to a simple filename (like a few typical English numbers or characters), it will open in qBittorrent properly. If I restore the name (it has Asian characters in the filename) and try to open it, qBittorrent gives the error again. So, I believe qBittorrent can't handle torrent files with foreign characters in the filename.
Edit: Forgot to mention that the error doesn't occur if you drag and drop the torrent file onto the qBittorrent window. So the problem with filenames is somewhere in the process of qBittorrent opening a file via double click or file association. Either way, the torrent still does not start unless you restart the client.
The "open destination folder" on the right click menu seems to be working again in the 3.0 beta. It will at least open the torrent's folder. However, if the torrent contains only a file, it simply opens your Downloads folder. I wish it would open that folder and highlight the file (Firefox has this exact feature. When you click the Downloads button to view the Downloads list, you can click the magnifying glass icon next to the download and it will open the directory with that file highlighted/selected).