Can't use protected Java class from an overriden protected method?

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I'm trying to use the org.apache.commons.collections.map.LRUMap class in http://commons.apache.org/collections/. I need to override the "removeLRU" method there, which was made exactly for the purpose of overriding.
(see [http://commons.apache.org/collections/api-release/org/apache/commons/collections/map/LRUMap.html#removeLRU(org.apache.commons.collections.map.AbstractLinkedMap.LinkEntry) removeLRU])

Compiling the following program

object test {
  import org.apache.commons.collections.map.LRUMap, org.apache.commons.collections.map.AbstractLinkedMap
  val map = new LRUMap {
    override def removeLRU (entry: AbstractLinkedMap.LinkEntry): Boolean = {
      // do something ...
      true
    }
  }
}

with Scala (Eclipse Plugin) 2.7.3.final I get the following error:
"class LinkEntry cannot be accessed in object org.apache.commons.collections.map.AbstractLinkedMap"

The identical Java program compiles okay:

class test {
  LRUMap map = new LRUMap() {
    protected boolean removeLRU (AbstractLinkedMap.LinkEntry entry) {
      // do something ...
      return true;
    }
  };
}

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Imported From: https://issues.scala-lang.org/browse/SI-1911?orig=1
Reporter: ArtemGr (artemgr)

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@dragos said:
This is a duplicate of #1806. You can find there more background information.