bcmwl-kernel-source 6.20.155.1 flooding kernel log with errors

[thyriel81]

Release: Raring Ringtail (development branch) 13.04 (kubuntu)
Package Version: 6.20.155.1

Kernel Log is flooded with the following errors while a WLAN connection is active (about 5-10 per second):
kernel [ 119.626150] ERROR @wl_cfg80211_get_station : Could not get rate (-1)
kernel [ 119.626153] ERROR @wl_cfg80211_get_station : Could not get rssi (-1)

WLAN Card is "Broadcom Corporation BCM4313 802.11b/g/n Wireless LAN Controller [14e4:4727]"

As the default driver used for that card doesnt work well for me i blacklisted brcmsmac and use the bcmwl-kernel-source
see thread about the problem i had a while back with that if it helps: http://ubuntuforums.org/showthread.php?p=12321873#post12321873

I have two systems installed, 12.10 for productive use and the 13.04 for testing around.
As it is working without those errors in 12.10 i uninnstalled bcmwl-kernel-source and replaced with 5.100.82.112 version from 12.10
Errors then do not appear again, so id guess its a problem with the new version of bcmwl-kernel-source

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[max5555 (max-ph)]

The same problem in Ubuntu 12.04 with bcmwl-kernel-source 6.20.155.1

There is a solution proposed here: https://bugs.launchpad.net/ubuntu/+source/bcmwl/+bug/923809/comments/22 but I have no idea how to apply the patch.