jRuby 1.7.3 is giving an incorrect (or at least inconsistent with MRI and jRuby 1.6.5) answer for a simple division problem

irb(main):002:0> require 'bigdecimal'
=> true
irb(main):003:0> BigDecimal.new(11023)/2.2046
=> #<BigDecimal:6515d4f9,'0.55115E4',5(8)>

The correct answer is 5000. MRI and jRuby 1.6.5 give the correct answer. 1.7.3 does not