This is what I wrote a long time ago and after that i don`t have any problems with Wifi at all. Works pretty great I am surprised that this driver is not included in Ubuntu 10.04. Because i am still with Ubuntu 9.10 and works great. Hope it will work for you too.
After install this http:// linuxwireless. org/en/ users/Download# Where_to_ download_ bleeding_ edge
It`s seem that this issue is gone.
But this is not a great solution after all.
Hope that someone will fix this.
This is what I wrote a long time ago and after that i don`t have any problems with Wifi at all. Works pretty great I am surprised that this driver is not included in Ubuntu 10.04. Because i am still with Ubuntu 9.10 and works great. Hope it will work for you too.