If i remember correctly, the RSS problem has been happening on v1.6.1 and all the v1.7 beta builds. I'm using v1.5.1 build 439 since it doesn't start RSS automatically. One problem with b439 is that whenever it fails to download a feed, it won't even try to download again since it has been marked downloaded, though it doesn't happen as frequent as v1.7 beta builds. I'm not sure about the tracker problem but i first noticed it on b2539 and it's still happening on 2740, µT just won't connect to any peers. v1.5.1 works fine though.