Major Description
DataNucleus 4.1 is released. The upgrade path to this version is likely a simple change of jar version number. Migration process is listed at
http://www.datanucleus.org/products/accessplatform_4_1/migration.html
and I doubt that any of the 4.0 -> 4.1 items would apply to ISIS.
Note : you WILL need to re-enhance any persistable classes to use this new release (since it makes a very minor change to the bytecode enhancement contract).