"Dependency Has Changed" Incorrectly Reported

In maven-war-plugin 2.1-alpha-2, execute the following on a war project:

mvn clean;
mvn install;
mvn install;

The 3rd command incorrectly lists messages for each dependency as follows:

[INFO] Dependency[Dependency

{groupId=com.mycompany, artifactId=myartifact, version=8.6.1, type=jar}]
has changed (was Dependency {groupId=com.mycompany, artifactId=myartifact, version=8.6.1, type=jar}

).

The first time that mvn install is run, dependencies are added to:
target\myapp-war-1.1-SNAPSHOT\WEB-INF\lib

The second invocation of mvn install appears to fail in comparing the existing jars in the above path with what is in the repository. The message states the dependencies have changed when in fact they have not.

This problem does not exist in maven-war-plugin 2.0.2.