[sqlite] shared cache mode locking

[Ken]

While using the new 3.5.4 sqlite3_enable_shared_cache I ran into a strange lock 
situation.
    
      SQLITE_LOCK is returned from an insert statement, even though the 
thread/connection performed a successful "begin exclusive" transaction.
     
       begin exclusive
        insert into table...   ---> returns SQLITE_LOCKED

Is it possible for both connections to begin exclusive transactions whilst 
having the shared cache anabled?

Thanks,
ken