Transmission is an open source BitTorrent client developed by many volunteers. It's designed to be easy, powerful and "just work" application. Nothing less from great and easy-to-use application, Tranmission is included by default in Ubuntu distribution for BitTorrent client application. Transmission has gained a new version 2.50 that brings many improvements and bug fixes:

All Platforms
  • Fix crash when adding some magnet links
  • Improved support for downloading webseeds with large files
  • Gracefully handle incorrectly-compressed data from webseed downloads
  • Fairer bandwidth distribution across connected peers
  • Use less CPU when calculating undownloaded portions of large torrents
  • Use the Selection Algorithm, rather than sorting, to select peer candidates
  • Use base-10 units when displaying bandwidth speed and disk space
  • If the OS has its own copy of natpmp, prefer it over our bundled version
  • Fix Fails-To-Build error on Solaris 10 from use of mkdtemp()
  • Fix Fails-To-Build error on FreeBSD from use of alloca()
  • Fix Fails-To-Build error when building without a C++ compiler for libuTP
For further information about this release, please visit this page.

Install Transmission 2.50 on Ubuntu
Ubuntu users including Ubuntu Oneiric and upcoming Ubuntu version Precise can instal Transmission 2.50 by adding it's PPA repository:
  • sudo add-apt-repository ppa:transmissionbt/ppa
  • sudo apt-get update
  • sudo apt-get install transmission
Once installed, Transmission 2.50 can be accessed from Internet section from the menu.

Regards :)