Blizzard has just posted a list of hotfixes for August 3rd. It looks like they are attempting to work on the "rubberbanding" issue a lot of users experience.
[blizzquote author='Blizzard' blue='http://www.diablofans.com/blizz-tracker/topic/231478-diablo-iii-hotfixes-august/' battle='http://us.battle.net/d3/en/blog/6871751']August 3
- Fixed several cases of "rubberbanding" that could sometimes occur while playing under extremely high latency, when a character changed direction or movement speed, or when a character used certain movement-based abilities (like Tempest Rush or Whirlwind)
- Fixed several game and service crashes