FULL PRODUCT VERSION :
Java SE Runtime Env. build 1.7.0-b147

ADDITIONAL OS VERSION INFORMATION :
MS Windows Version 6.1.7601

A DESCRIPTION OF THE PROBLEM :
According to JLS section 7.5.3, "If a compilation unit contains both a single-static-import declaration that imports a type whose simple name is n, and a single-type-import declaration (§7.5.1) that imports a type whose simple name is n, a compile-time error occurs."
However, in the test case given below no error is reported, even though the (implicitly) static interface bug.Animal.FROG is imported by two import statements.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Try to compile this code snippet

=========bug/Animal.java=======================

    package bug;

    public enum Animal {
      FROG;

      public interface FROG {}
    }

=========p/Imports.java==========================
   package p;

    import bug.Animal;
    import bug.Animal.FROG; //(1)
    import static bug.Animal.FROG; //(2)

    public class Imports {
      public static void main(String[] args) {
        print(FROG);
      }

      static FROG print(Animal animal) {
        System.out.println(animal.name());
        return null;
      }
    }

While import statement marked (1) imports the type bug.Animal.FROG, the statement marked (2) imports the field bug.Animal.FROG as well as the type bug.Animal.FROG. Hence, EXPECTED: there should be a compile error about conflicting imports. ACTUAL: compiles successfully.

(To check that the single type import (1) indeed imports the type bug.Animal.FROG, the above snippet can be compiled by removing the static import and the sysout line)


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
  Program should report conflicting imports because both (1) and (2) import the interface bug.Animal.FROG
ACTUAL -
  Program compiles

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
=========bug/Animal.java=======================

    package bug;

    public enum Animal {
      FROG;

      public interface FROG {}
    }

=========p/Imports.java==========================
   package p;

    import bug.Animal;
    import bug.Animal.FROG; //(1)
    import static bug.Animal.FROG; //(2)

    public class Imports {
      public static void main(String[] args) {
        print(FROG);
      }

      static FROG print(Animal animal) {
        System.out.println(animal.name());
        return null;
      }
    }
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Use the fully qualified name instead of importing