IllegalArgumentException during build when xml element name is "STRUCT"

The following exception is thrown when building using the eclipse plug-in.
It only occurs if I change the name of my mapping to "STRUCT". "STRUCTURE" works fine - but I have to map to someone elses xml.

<binding>
<mapping name="STRUCT" class="au.com.xxx.xxxx">
...
</mapping>
</binding>

java.lang.IllegalArgumentException:
at org.eclipse.core.runtime.Assert.isLegal(Assert.java:63)
at org.eclipse.core.runtime.Assert.isLegal(Assert.java:47)
at org.eclipse.core.runtime.Status.setSeverity(Status.java:244)
at org.eclipse.core.runtime.Status.<init>(Status.java:82)
at org.jibx.eclipse.builder.JibxBindingBuilder.bindAll(JibxBindingBuilder.java:169)
at org.jibx.eclipse.builder.JibxBindingBuilder.incrementalBuild(JibxBindingBuilder.java:207)
at org.jibx.eclipse.builder.JibxBindingBuilder.build(JibxBindingBuilder.java:98)
at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:627)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:170)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:201)
at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:253)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:256)
at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:309)
at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:341)
at org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:140)
at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:238)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)