I was finally able to get git and svn talk to one another, and pushed my recent changes into trunk.
The new Spatial contrib is bearing the non-standard version of 2.9.9, on purpose. It also contains Spatial4n in a binary form, mimicking the way it works in Java Lucene. The few tests that present pass, but when run in a chain I get the following failure - hadn't had time to run it down: Test 'Lucene.Net.Contrib.Spatial.Test.Prefix.TestRecursivePrefixTreeStrategy.BaseRecursivePrefixTreeStrategyTestCase.testFilterWithVariableScanLevel' failed: Lucene.Net.Store.AlreadyClosedException : this IndexReader is closed Index\IndexReader.cs(204,0): at Lucene.Net.Index.IndexReader.EnsureOpen() Index\DirectoryReader.cs(497,0): at Lucene.Net.Index.DirectoryReader.DoReopen(Boolean openReadOnly, IndexCommit commit) Index\DirectoryReader.cs(462,0): at Lucene.Net.Index.DirectoryReader.Reopen() SpatialTestCase.cs(111,0): at Lucene.Net.Contrib.Spatial.Test.SpatialTestCase.commit() SpatialTestCase.cs(94,0): at Lucene.Net.Contrib.Spatial.Test.SpatialTestCase.addDocumentsAndCommit(List`1 documents) StrategyTestCase.cs(67,0): at Lucene.Net.Contrib.Spatial.Test.StrategyTestCase`1.getAddAndVerifyIndexedDocuments(String testDataFile) Prefix\BaseRecursivePrefixTreeStrategyTestCase.cs(53,0): at Lucene.Net.Contrib.Spatial.Test.Prefix.BaseRecursivePrefixTreeStrategyTestCase.testFilterWithVariableScanLevel() Ideas welcome.