Chunker behavior changed in 1.5.3?

[Lance Norskog]

My Lucene OpenNLP patch (LUCENE-2899) contains small test data sets just 
to create unit tests. The patch runs MaxEnt on this test data and then 
uses the .bin files to run simple unit tests. These datasets are 
completely bogus, they only exist to demonstrate a complete round trip.

The chunker output changed slightly from 1.5.2-incubation to 1.5.3. Was 
this expected? Was there some change in MaxEnt that caused generated 
models to change? If there was, that's fine, as long as someone expected 
this. But it does mean that the old models on Sourceforge may be 
slightly wrong.

Lance