MassAssignment problem with ActiveRecord 2.3.9

Hi,
i have a problem with ActiveRecord 2.3.9, the massassignment doesn't
work. New Database entry is nil for all parameters.
If i use ActiveRecord 2.3.5 everything works fine.
Anybody an idea if there is a bug?

#ActiveRecord::Base.establish_connection(...)
#class Tag < ActiveRecord::Base;end
Tag.create(...)
Tag.find(:all)

Thanks,
astrid