Known problem in Checkstyle-IDEA?

When I install Checkstyle-IDEA into 7.0.5, I get the following error on startup...

java.lang.NoClassDefFoundError: org/apache/commons/lang/builder/HashCodeBuilder
at org.infernus.idea.checkstyle.model.ConfigurationLocation.hashCode(
at java.util.WeakHashMap.getEntry(
at java.util.WeakHashMap.containsKey(
at org.infernus.idea.checkstyle.model.ConfigurationLocationFactory.create(


I am able to workaround the problem by dropping the commons-lang.jar into the plugins\Checkstyle-IDEA\lib dir

Wondering if anyone else has seen this problem?
Also wondering if my workaround may cause other problems (not sure how that lib dir propagates to the project classpath, for example)?


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