There're new versions of the JSourceObjectizer (V1.07) and the grammars that support such literals now.
Furthermore there was another grammar problem that is fixed in the new version (v2011-10-26; also used for the JSourceObjectizer V1.07). In some situations nested generic type arguments were not recognized correctly and bound to wrong owners. The new solution for resolving nested generic type arguments within the new grammar has been tested heavily and this problem seems to be history now.