correct version number

xml/dom-impl/src/com/intellij/util/xml/DomFileIndex.java

@@ -103,6 +103,6 @@ public class DomFileIndex extends ScalarIndexExtension<String>{
 
   @Override
   public int getVersion() {
-    return DomApplicationComponent.getInstance().getCumulativeVersion();
+    return DomApplicationComponent.getInstance().getCumulativeVersion(false);
   }
 }

xml/dom-impl/src/com/intellij/util/xml/impl/DomApplicationComponent.java

@@ -105,11 +105,17 @@ public class DomApplicationComponent {
     return ServiceManager.getService(DomApplicationComponent.class);
   }
 
-  public int getCumulativeVersion() {
+  public int getCumulativeVersion(boolean forStubs) {
     int result = 0;
     for (DomFileDescription description : getAllFileDescriptions()) {
-      if (description.hasStubs()) {
-        result += description.getStubVersion();
+      if (forStubs) {
+        if (description.hasStubs()) {
+          result += description.getStubVersion();
+          result += description.getRootTagName().hashCode(); // so that a plugin enabling/disabling could trigger the reindexing
+        }
+      }
+      else {
+        result += description.getVersion();
         result += description.getRootTagName().hashCode(); // so that a plugin enabling/disabling could trigger the reindexing
       }
     }

xml/dom-impl/src/com/intellij/util/xml/stubs/builder/DomStubBuilder.java

@@ -92,6 +92,6 @@ public class DomStubBuilder implements BinaryFileStubBuilder {
 
   @Override
   public int getStubVersion() {
-    return 21 + DomApplicationComponent.getInstance().getCumulativeVersion();
+    return 21 + DomApplicationComponent.getInstance().getCumulativeVersion(true);
   }
 }