Better errors reporting for this case:

namespace a {
  import // <-- error
} // <-- reported here

namespace b {
  class Y {
      class object {}
      class Z {}
  }
} // <-- used to be reported here

compiler/frontend/src/org/jetbrains/jet/lang/parsing/JetParsing.java

@@ -167,7 +167,7 @@ public class JetParsing extends AbstractJetParsing {
         }
 
         PsiBuilder.Marker reference = mark();
-        expect(IDENTIFIER, "Expecting qualified name", TokenSet.create(DOT, AS_KEYWORD));
+        expect(IDENTIFIER, "Expecting qualified name");
         reference.done(REFERENCE_EXPRESSION);
         while (at(DOT) && lookahead(1) != MUL) {
             advance(); // DOT