beanshell using wrong case when looking for class

I've spent days trying to locate the cause of this problem. The actual 
class is com.example.commons.plugin.Plugin, but it appears to be looking 
for .plugin. Has anyone seen this before? Do you know what causes it to 
look for the wrong name?

A class required by class: com.example.commons.plugin.plugin could not 
be loaded:
java.lang.NoClassDefFoundError: com/example/commons/plugin/plugin (wrong 
name: com/example/commons/plugin/Plugin)  at 
bsh.BshClassManager.noClassDefFound
   at bsh.BshClassManager.plainClassForName
   at bsh.BshClassManager.classForName
   at bsh.NameSpace.classForName
   at bsh.NameSpace.getImportedClassImpl
   at bsh.NameSpace.getClassImpl
   at bsh.NameSpace.getClass
   at bsh.Name.consumeNextObjectField
   at bsh.Name.toObject
   at bsh.BSHAmbiguousName.toObject
   at bsh.BSHAllocationExpression.objectAllocation
   at bsh.BSHAllocationExpression.eval
   at bsh.BSHPrimaryExpression.eval
   at bsh.BSHPrimaryExpression.eval
   at bsh.Interpreter.eval
   at bsh.Interpreter.eval
   at bsh.Interpreter.eval

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