jdbcsqlite3 adapter does not respect default parameter

Assume a Model class created by migration such as this:

class CreateModels < ActiveRecord::Migration
def self.up
create_table :models do |t|
t.column :prop, :string, :default => ''

t.timestamps
end
end

def self.down
drop_table :models
end
end

This will yield:

$ jruby script/console
Loading development environment (Rails 2.1.0)
>> m=Model.new
=> #<Model id: nil, prop: nil, created_at: nil, updated_at: nil>

The same model, with MRI 1.8.6-p111, Rails 2.1.0, sqlite3-ruby 1.2.1, yields:

$ ruby script/console
Loading development environment (Rails 2.1.0)
>> m=Model.new
=> #<Model id: nil, prop: "", created_at: nil, updated_at: nil>