Create a new file "php.ini" in your admin folder. Then open it and add your values etc,
suhosin.request.max_varname_length = 1000000
suhosin.get.max_value_length = 2000
suhosin.request.max_vars = 4096
suhosin.post.max_vars = 4100
Close and check your ipb admin dashboard, errors should now have gone.