The latest version of the Java® 1.5 grammars that can be downloaded from this site have been tested with ANLTRv3.5 and everything seems to be okay.
There's also a new JSourceObjectizer version available (V1.52) that contains minor changes to work with ANTLRv3.5.
The new JSourceObjectizer uses ANTLRv3.5 and contains a small workaround regarding a strange behavior when reseting ANTLR's TreeParser. JSourceObjectizer V1.52 is in use within two customer projects for a while now and has been proofed to be stabile - so it can be downloaded from now on.