Hello,
As my JIRA account is locked and I do not have an optoin to unlock it IMHO. I resolved to report the problem here. It seems that MonetBulkLoader Step blows up on a Date field:

2014/02/04 14:11:13 - MonetDB Bulk Loader.0 - ERROR (version 5.0.1-stable, build 1 from 2013-11-15_16-08-58 by buildguy) : Error in step, asking everyone to stop because of:
2014/02/04 14:11:13 - MonetDB Bulk Loader.0 - ERROR (version 5.0.1-stable, build 1 from 2013-11-15_16-08-58 by buildguy) : org.pentaho.di.core.exception.KettleException:
2014/02/04 14:11:13 - MonetDB Bulk Loader.0 - Error serializing rows of data to the MonetDB API (MAPI).
2014/02/04 14:11:13 - MonetDB Bulk Loader.0 - at java.lang.Thread.run (Thread.java:744)
2014/02/04 14:11:13 - MonetDB Bulk Loader.0 - at org.pentaho.di.trans.step.RunThread.run (RunThread.java:60)
2014/02/04 14:11:13 - MonetDB Bulk Loader.0 - at org.pentaho.di.trans.steps.monetdbbulkloader.MonetDBBulkLoader.processRow (MonetDBBulkLoader.java:207)
2014/02/04 14:11:13 - MonetDB Bulk Loader.0 - at org.pentaho.di.trans.steps.monetdbbulkloader.MonetDBBulkLoader.writeRowToMonetDB (MonetDBBulkLoader.java:232)
2014/02/04 14:11:13 - MonetDB Bulk Loader.0 - at org.pentaho.di.trans.steps.monetdbbulkloader.MonetDBBulkLoader.addRowToBuffer (MonetDBBulkLoader.java:319)
2014/02/04 14:11:13 - MonetDB Bulk Loader.0 -
2014/02/04 14:11:13 - MonetDB Bulk Loader.0 - at org.pentaho.di.trans.steps.monetdbbulkloader.MonetDBBulkLoader.addRowToBuffer(MonetDBBulkLoader.java:384)
2014/02/04 14:11:13 - MonetDB Bulk Loader.0 - at org.pentaho.di.trans.steps.monetdbbulkloader.MonetDBBulkLoader.writeRowToMonetDB(MonetDBBulkLoader.java:232)
2014/02/04 14:11:13 - MonetDB Bulk Loader.0 - at org.pentaho.di.trans.steps.monetdbbulkloader.MonetDBBulkLoader.processRow(MonetDBBulkLoader.java:207)
2014/02/04 14:11:13 - MonetDB Bulk Loader.0 - at org.pentaho.di.trans.step.RunThread.run(RunThread.java:60)
2014/02/04 14:11:13 - MonetDB Bulk Loader.0 - at java.lang.Thread.run(Thread.java:744)
2014/02/04 14:11:13 - MonetDB Bulk Loader.0 - Caused by: java.lang.NullPointerException
2014/02/04 14:11:13 - MonetDB Bulk Loader.0 - at org.pentaho.di.trans.steps.monetdbbulkloader.MonetDBBulkLoader.addRowToBuffer(MonetDBBulkLoader.java:319)
2014/02/04 14:11:13 - MonetDB Bulk Loader.0 - ... 4 more
2014/02/04 14:11:13 - Table input.0 - Finished reading query, closing connection.
2014/02/04 14:11:13 - MonetDB Bulk Loader.0 - Finished processing (I=0, O=0, R=1, W=0, U=0, E=1)

Anybody hit that ? Or am I doing something wrong?

Thank you,
Radovan