### Eclipse Workspace Patch 1.0
#P org.eclipse.jdt.core
Index: batch/org/eclipse/jdt/internal/compiler/batch/ClasspathDirectory.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core/batch/org/eclipse/jdt/internal/compiler/batch/ClasspathDirectory.java,v
retrieving revision 1.56
diff -u -r1.56 ClasspathDirectory.java
--- batch/org/eclipse/jdt/internal/compiler/batch/ClasspathDirectory.java	7 Jan 2010 20:18:49 -0000	1.56
+++ batch/org/eclipse/jdt/internal/compiler/batch/ClasspathDirectory.java	11 Aug 2010 17:47:53 -0000
@@ -115,6 +115,13 @@
 	if (binaryExists) {
 		try {
 			ClassFileReader reader = ClassFileReader.read(this.path + qualifiedBinaryFileName);
+			// https://bugs.eclipse.org/bugs/show_bug.cgi?id=321115, package names are to be treated case sensitive.
+			String typeSearched = qualifiedPackageName.length() > 0 ? 
+					qualifiedPackageName.replace(File.separatorChar, '/') + "/" + fileName //$NON-NLS-1$
+					: fileName;
+			if (!CharOperation.equals(reader.getName(), typeSearched.toCharArray())) {
+				reader = null;
+			}
 			if (reader != null)
 				return new NameEnvironmentAnswer(
 						reader,
#P org.eclipse.jdt.core.tests.compiler
Index: src/org/eclipse/jdt/core/tests/compiler/regression/BatchCompilerTest.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.core.tests.compiler/src/org/eclipse/jdt/core/tests/compiler/regression/BatchCompilerTest.java,v
retrieving revision 1.208
diff -u -r1.208 BatchCompilerTest.java
--- src/org/eclipse/jdt/core/tests/compiler/regression/BatchCompilerTest.java	1 Jun 2010 15:23:24 -0000	1.208
+++ src/org/eclipse/jdt/core/tests/compiler/regression/BatchCompilerTest.java	11 Aug 2010 17:50:14 -0000
@@ -3109,6 +3109,7 @@
 		this.runConformTest(
 			new String[] {
 				"p/Y.java",
+				"package p;\n" +
 				"public class Y { public static final String S = \"\"; }",
 			},
 	        "\"" + OUTPUT_DIR +  File.separator + "p" + File.separator + "Y.java\""