With b49, the following example:

public class Foo {
    Class<?>[] get() { return null; }

    void set(Class... c) { }

    void test() {
set(get());
    }
}

results in

Foo.java:7: warning: fixed-arity call of variable-arity method with inexact match for last parameter;
cast to java.lang.Class for a variable-arity call
cast to java.lang.Class[] for a fixed-arity call
set(get());
               ^
1 warning

Suggesting a cast from Class<?>[] to Class makes no sense. The ambiguity in this call is not obvious to me.