### 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 06:26:12 -0000
@@ -115,6 +115,11 @@
 	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.replace(File.separatorChar, '/') + "/" + fileName; //$NON-NLS-1$
+			if (!CharOperation.equals(reader.getName(), typeSearched.toCharArray())) {
+				reader = null;
+			}
 			if (reader != null)
 				return new NameEnvironmentAnswer(
 						reader,