commons-logging.jar in Seam and RESTEasy are in sync (1.1.1), however it differs in the EAP (1.1.0):
jboss-as/common/lib/commons-logging.jar
seam/lib/commons-logging.jar and resteasy/lib/commons-logging.jar

manifest from EAP:
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Manifest-Version: 1.0
Specification-Title: Jakarta Commons Logging
Created-By: 1.5.0_10-b03 (Sun Microsystems Inc.)
Ant-Version: Apache Ant 1.6.5
Implementation-Title: Jakarta Commons Logging
Specification-Version: 1.0
Specification-Vendor: Apache Software Foundation
Implementation-Vendor-Id: jboss.org
Extension-Name: org.apache.commons.logging
Implementation-Version: 1.1.0.jboss
Implementation-Vendor: Red Hat Middleware LLC
Implementation-URL: http://www.jboss.org/
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manifest from Seam:
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Manifest-Version: 1.0
Specification-Title: Commons Logging
Created-By: R27.5.0-110_CR366951-97327-1.5.0_14-20080408-1711-linux-ia
32 (BEA Systems, Inc.)
Ant-Version: Apache Ant 1.6.5
Implementation-Title: Commons Logging
Specification-Version: 1.0
Specification-Vendor: Apache Software Foundation
Implementation-Vendor-Id: org.apache
Extension-Name: org.apache.commons.logging
Implementation-Version: 1.1.1
Implementation-Vendor: Apache Software Foundation
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