NPE when using createSubcontext() with embedded server

We've found a problem with DS 1.0.2. This problem only exists when running with DS embedded in the same VM.
Running the same code remotely (outside of DS VM) works fine.

Example code:

....
Attributes attrs = new BasicAttributes();
attrs.put("objectClass", "organizationalUnit");
attrs.put("description", "Test OU");

DirContext subContext = context.createSubcontext("ou=Test", attrs);

Exception from createSubcontext():

Caused by: java.lang.NullPointerException
at org.apache.directory.shared.ldap.util.AttributeUtils.containsValueCaseIgnore(AttributeUtils.java:309)
at org.apache.directory.server.core.schema.SchemaService.assertAllAttributesAllowed(SchemaService.java:1806)
at org.apache.directory.server.core.schema.SchemaService.check(SchemaService.java:1624)
at org.apache.directory.server.core.schema.SchemaService.add(SchemaService.java:1636)
at org.apache.directory.server.core.interceptor.InterceptorChain$Entry$1.add(InterceptorChain.java:1181)
... 130 more

If you change the BasicAttributes() constructor call to:

Attributes attrs = new BasicAttributes( true );

it works fine.