Comment 2 for bug 134344

wow pclinux os sucks, and ubuntu still hasnt fixed this in ubuntu gutsy beta, this problem has been sitting around for a while, the driver was poorly coded, a fix has been released but needs to be added to ubuntu:
http://git.kernel.org/?p=linux%2Fkernel%2Fgit%2Flinville%2Fwireless-dev.git&a=search&h=rt2x00&st=commit&s=rt73