Fairly trivial, but if one uses the RangeFacetHandler constructor that takes in an autoRange parameter, the constructor defaults to true, and ignores the parameter value passed in:

public RangeFacetHandler(String name,String indexFieldName,TermListFactory termListFactory,boolean 

autoRange) { super(name); _dataCache = null; _indexFieldName = indexFieldName; _termListFactory = termListFactory; _predefinedRanges = null; _autoRange = true; }

Thanks tallpsmith!