Comment 45 for bug 177856

I think the problem for me stemmed from some old nspluginwrapper files (I built it manually awhile back) that were still in /usr/bin or /usr/local/bin. Please check there to see if you have any older nsplugin files and reinstall nspluginwrapper and flashplayer-nonfree. That solved my problem so it may not be related to this bug.