[rules-users] Downloading 5.1: bad contents of binaries?!

After downloading 5.1 binaries from http://www.jboss.org/drools/downloads.html and unzipping them in a fresh, new directory I find: wlaun@atvienw39033:/extra/drools-5.1/bin$ ls -l total 14316 -rw-r--r-- 1 wlaun wlaun 116205 2010-08-04 13:44 antlr-runtime.jar -rw-rw-r-- 1 wlaun wlaun 12866 2010-07-30 10:22 drools-ant-5.1.0.jar -rw-rw-r-- 1 wlaun wlaun 156008 2010-07-30 10:22 drools-api-5.1.0.jar <<<<<<<<<<<<<<<<<<<<< -rw-r--r-- 1 wlaun wlaun 127191 2010-08-04 13:44 drools-api.jar <<<<<<<<<<<<<<<<<<<<< -rw-rw-r-- 1 wlaun wlaun 16589 2010-07-30 10:22 drools-bam-5.1.0.jar -rw-rw-r-- 1 wlaun wlaun 266804 2010-07-30 10:22 drools-bpmn2-5.1.0.jar -rw-rw-r-- 1 wlaun wlaun 38093 2010-07-30 10:22 drools-camel-5.1.0.jar -rw-rw-r-- 1 wlaun wlaun 84894 2010-07-30 10:22 drools-clips-5.1.0.jar -rw-rw-r-- 1 wlaun wlaun 1119468 2010-07-30 10:22 drools-compiler-5.1.0.jar <<<<<<<<<<<<<<<<<<<< -rw-r--r-- 1 wlaun wlaun 1159712 2010-08-04 13:44 drools-compiler.jar <<<<<<<<<<<<<<<<<<<<< -rw-rw-r-- 1 wlaun wlaun 2103665 2010-07-30 10:22 drools-core-5.1.0.jar <<<<<<<<<<<<<<<<<<<<< -rw-r--r-- 1 wlaun wlaun 1776713 2010-08-04 13:44 drools-core.jar <<<<<<<<<<<<<<<<<<<<< -rw-rw-r-- 1 wlaun wlaun 49926 2010-07-30 10:22 drools-decisiontables-5.1.0.jar <<<<<<<<<<<<<<<<<<<<< -rw-r--r-- 1 wlaun wlaun 47227 2010-08-04 13:44 drools-decisiontables.jar <<<<<<<<<<<<<<<<<<<<< -rw-rw-r-- 1 wlaun wlaun 8992 2010-07-30 10:22 drools-doc-5.1.0.jar -rw-rw-r-- 1 wlaun wlaun 61872 2010-07-30 10:22 drools-grid-core-5.1.0.jar -rw-rw-r-- 1 wlaun wlaun 30056 2010-07-30 10:22 drools-jsr94-5.1.0.jar <<<<<<<<<<<<<<<<<<<<< -rw-r--r-- 1 wlaun wlaun 30110 2010-08-04 13:44 drools-jsr94.jar <<<<<<<<<<<<<<<<<<<<< -rw-rw-r-- 1 wlaun wlaun 60520 2010-07-30 10:22 drools-persistence-jpa-5.1.0.jar -rw-rw-r-- 1 wlaun wlaun 199641 2010-07-30 10:22 drools-process-task-5.1.0.jar -rw-rw-r-- 1 wlaun wlaun 13949 2010-07-30 10:22 drools-simulator-5.1.0.jar -rw-rw-r-- 1 wlaun wlaun 46808 2010-07-30 10:22 drools-spring-5.1.0.jar -rw-rw-r-- 1 wlaun wlaun 53291 2010-07-30 10:22 drools-templates-5.1.0.jar <<<<<<<<<<<<<<<<<<<<< -rw-r--r-- 1 wlaun wlaun 46160 2010-08-04 13:44 drools-templates.jar <<<<<<<<<<<<<<<<<<<<< -rw-rw-r-- 1 wlaun wlaun 192069 2010-07-30 10:22 drools-verifier-5.1.0.jar -rw-rw-r-- 1 wlaun wlaun 35248 2010-07-30 10:22 drools-workitems-5.1.0.jar -rw-r--r-- 1 wlaun wlaun 534827 2010-08-04 13:44 joda-time.jar -rw-r--r-- 1 wlaun wlaun 13749 2010-08-04 13:44 jsr94.jar -rw-r--r-- 1 wlaun wlaun 499068 2010-08-04 13:44 jxl.jar drwxrwxr-x 2 wlaun wlaun 4096 2010-07-30 10:22 lib -rw-rw-r-- 1 wlaun wlaun 11358 2010-07-30 10:22 LICENSE-ASL-2.0.txt -rw-r--r-- 1 wlaun wlaun 607526 2010-08-04 13:44 mvel2.jar -rw-r--r-- 1 wlaun wlaun 4372548 2010-08-04 13:44 org.eclipse.jdt.core_3.4.4.v_894_R34x.jar -rw-rw-r-- 1 wlaun wlaun 3084 2010-07-30 10:22 README_DEPENDENCIES.txt -rw-r--r-- 1 wlaun wlaun 119888 2010-08-04 13:44 xpp3.jar -rw-r--r-- 1 wlaun wlaun 24956 2010-08-04 13:44 xpp3_min.jar -rw-r--r-- 1 wlaun wlaun 431406 2010-08-04 13:44 xstream.jar Please s.o. look into this. -W