Retrace done.
Extract from retraced stacktrace:
...
#3 signal handler called
#4 NP_Shutdown () /home/eric/.mozilla/plugins/libflashplayer.so
#5 NP_Shutdown () /home/eric/.mozilla/plugins/libflashplayer.so
#6 NP_Shutdown () /home/eric/.mozilla/plugins/libflashplayer.so
#7 NP_Shutdown ()
qrusty, please, can you replace your third party flash plugin with ubuntu's
flashplugin-nonfree package and try to reproduce the crash.
If the crash happens again with ubuntu's native package please upload the new
crash report to [1]. Then we will reopen this thread. Now we close it because
you