The line that promped the javac error is:
List<LinkedList<DateScoreSortable<BaseNewsArticleView>>> lists = getMyLists(...);
I know it look strange, but that's what I needed. Actually I had this code in a test class, but I do use this funky structure in the business logic. Anyway it seems to trigger an edge case in the Sun compiler. The Eclipse JDT incremental Java compiler did not have any problems with the code, it compiled and run it without problems.
I really don't have time now to submit the bug and full sample, maybe later.
By the way it happened on my Mac java version "1.5.0_13". To solved the problem I used the same data sutucture but without the generics, i.e.:
List lists = getMyLists(...);