My solution was to change the router's encryption mode from WPA2 Personal - TKIP or AES to WPA2 Personal - AES. Changing to AES Encryption fixed it immediately.
Router: Linksys WRT160N Intel 3945abg Ubuntu 10.04 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/621265 Title: Slow Wireless Connection in Intel 3945abg -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs