Same here. It gave me this:
Then:
1)
% cat /usr/local/share/opera/bin/operapluginwrapper
Code:
#!/bin/sh
if [ brandelf $3 | grep "FreeBSD" ]; then
exec $0.freebsd $@
else
exec $0.linux $@
fi
2)
# cp ./operapluginwrapper.freebsd ./operapluginwrapper.linux
3)
% opera
No warning.