diff --git a/content/treestyletab/treestyletabbrowser.js b/content/treestyletab/treestyletabbrowser.js
index 632cf6b2..c7a3cf75 100644
--- a/content/treestyletab/treestyletabbrowser.js
+++ b/content/treestyletab/treestyletabbrowser.js
@@ -4047,8 +4047,6 @@ TreeStyleTabBrowser.prototype = {
 			return;
 		}
 
-		var startIndent = this.getPropertyPixelValue(aTab, property);
-
 		var CSSTransitionEnabled = ('Transition' in aTab.style || 'MozTransition' in aTab.style);
 		if (CSSTransitionEnabled) {
 			aTab.__treestyletab__updateTabIndentTask = function(aTime, aBeginning, aChange, aDuration) {
@@ -4067,6 +4065,7 @@ TreeStyleTabBrowser.prototype = {
 			return;
 		}
 
+		var startIndent = this.getPropertyPixelValue(aTab, property);
 		var delta       = aIndent - startIndent;
 		var radian      = 90 * Math.PI / 180;
 		var self        = this;
diff --git a/install.rdf b/install.rdf
index 6f9a8b60..6afee1e5 100644
--- a/install.rdf
+++ b/install.rdf
@@ -5,7 +5,7 @@
   <RDF:Description RDF:about="urn:mozilla:install-manifest"
                    em:id="treestyletab@piro.sakura.ne.jp"
                    em:name="Tree Style Tab"
-                   em:version="0.10.2010080801"
+                   em:version="0.10.2010080802"
                    em:creator="SHIMODA Hiroshi"
                    em:description="Show tabs like a tree."
                    em:homepageURL="http://piro.sakura.ne.jp/xul/_treestyletab.html.en"