Martin Šimka Are you sure this is the error you have for:
FooBarTest.testLimit
FooBarTest.testPersistCollections
ImplicitJoinTest.testImplicitJoinFromExplicitCollectionJoin
?

The first two have byte arrays but I don't see any comparison. There might be one hidden though so I might be wrong but it's worth checking.

As for the last one, I don't see any byte array at all so please check it is the same error.