DECIMAL32 values are not consistent in Ruby

On 32-bit EL6 running Ruby 1.8.7, DECIMAL32 values change. For example, the following happened during running the rspec tests:

2) A data object can hold a decimal32
Failure/Error: expect(@data.decimal32).to eq(value)

expected: 1161181977
got: 1536795250

(compared using ==)

1. ./spec/qpid/proton/data_spec.rb:304