diff --git a/platform/lang-impl/src/com/intellij/build/BuildTreeConsoleView.java b/platform/lang-impl/src/com/intellij/build/BuildTreeConsoleView.java
index e1d4b9fdf7f2..6cc66d2c9903 100644
--- a/platform/lang-impl/src/com/intellij/build/BuildTreeConsoleView.java
+++ b/platform/lang-impl/src/com/intellij/build/BuildTreeConsoleView.java
@@ -211,7 +211,9 @@ public class BuildTreeConsoleView implements ConsoleView, DataProvider, BuildCon
           int lastSize = getLastSize();
           if (firstSize == 0 && lastSize == 0) {
             int width = Math.round(getWidth() / 2f);
-            setFirstSize(width);
+            if (width > 0) {
+              setFirstSize(width);
+            }
           }
         }
       }
diff --git a/platform/platform-api/src/com/intellij/openapi/ui/ThreeComponentsSplitter.java b/platform/platform-api/src/com/intellij/openapi/ui/ThreeComponentsSplitter.java
index bf7db8c96ba2..3dd3432f19d7 100644
--- a/platform/platform-api/src/com/intellij/openapi/ui/ThreeComponentsSplitter.java
+++ b/platform/platform-api/src/com/intellij/openapi/ui/ThreeComponentsSplitter.java
@@ -494,16 +494,18 @@ public class ThreeComponentsSplitter extends JPanel implements Disposable {
 
 
   public void setFirstSize(final int size) {
+    int oldSize = myFirstSize;
     myFirstSize = Math.max(getMinSize(true), size);
-    if (firstVisible()) {
+    if (firstVisible() && oldSize != myFirstSize) {
       doLayout();
       repaint();
     }
   }
 
   public void setLastSize(final int size) {
+    int oldSize = myLastSize;
     myLastSize = Math.max(getMinSize(false), size);
-    if (lastVisible()) {
+    if (lastVisible() && oldSize != myLastSize) {
       doLayout();
       repaint();
     }