Transmission 2.13 is the definitive upgrade I have been waiting for. I guess they finally put auto-bandwidth detection to work because it definitely changes the way I do multi-task now. Firefox 4.0 and Evolution is open (as well as Empathy and Gwibber) and none of them are complaining about bandwidth. And no it isn't my internet connection. I'm still using the same crappy ISP.
It is such fun to be able to leave my torrents downloading and uploading in the background and still do my other web activities. One more good reason why you should upgrade.