diff --git a/platform/core-impl/src/com/intellij/openapi/vfs/impl/jar/CoreJarVirtualFile.java b/platform/core-impl/src/com/intellij/openapi/vfs/impl/jar/CoreJarVirtualFile.java
index e0c4af1adc4a..25286f8b820e 100644
--- a/platform/core-impl/src/com/intellij/openapi/vfs/impl/jar/CoreJarVirtualFile.java
+++ b/platform/core-impl/src/com/intellij/openapi/vfs/impl/jar/CoreJarVirtualFile.java
@@ -58,7 +58,15 @@ public class CoreJarVirtualFile extends VirtualFile {
   @Override
   public String getPath() {
     if (myParent == null) return myHandler.myBasePath + "!/";
-    return myParent.getPath() + "/" + myEntry.shortName;
+
+    String parentPath = myParent.getPath();
+    StringBuilder answer = new StringBuilder(parentPath.length() + 1 + myEntry.shortName.length());
+    if (answer.charAt(answer.length() - 1) != '/') {
+      answer.append('/');
+    }
+    answer.append(myEntry.shortName);
+    
+    return answer.toString();
   }
 
   @Override
diff --git a/platform/platform-api/src/com/intellij/ide/diff/DirDiffSettings.java b/platform/platform-api/src/com/intellij/ide/diff/DirDiffSettings.java
index d37ccdea1c8a..592607973708 100644
--- a/platform/platform-api/src/com/intellij/ide/diff/DirDiffSettings.java
+++ b/platform/platform-api/src/com/intellij/ide/diff/DirDiffSettings.java
@@ -38,6 +38,7 @@ public class DirDiffSettings {
   public boolean showNewOnTarget = true;
   public boolean showCompareModes = true;
   public CompareMode compareMode = CompareMode.CONTENT;
+  public double compareTimestampAccuracy = 0;
 
   public boolean showInFrame = true; // in dialog otherwise
 
diff --git a/platform/vcs-impl/src/com/intellij/openapi/diff/impl/dir/DTree.java b/platform/vcs-impl/src/com/intellij/openapi/diff/impl/dir/DTree.java
index fc0aadd8898e..55f79ac29eb4 100644
--- a/platform/vcs-impl/src/com/intellij/openapi/diff/impl/dir/DTree.java
+++ b/platform/vcs-impl/src/com/intellij/openapi/diff/impl/dir/DTree.java
@@ -162,7 +162,7 @@ public class DTree {
               dtype = isEqual(src, trg) ? DType.EQUAL : DType.CHANGED;
               break;
             case TIMESTAMP:
-              dtype = src.getTimeStamp() == trg.getTimeStamp() ? DType.EQUAL : DType.CHANGED;
+              dtype = Math.abs(src.getTimeStamp() - trg.getTimeStamp()) <= settings.compareTimestampAccuracy ? DType.EQUAL : DType.CHANGED;
               break;
           }
         }