When creating service specifications using the nested <service> element, the resulting folder in the jar file is named META-INF/service though it must be META-INF/services Apache Ant version 1.7.0 compiled on December 13 2006 on java version "1.6.0-beta2", windows XP
Already fixed, due in ant 1.7.1. Thanks for the report. *** This bug has been marked as a duplicate of 41201 ***