do not perform animation on image if the new image is the same

CLCGCell.h

@@ -63,12 +63,12 @@
   id        mContext;
 }
 
-@property(nonatomic,retain) NSString  *imgUrl;
-@property(nonatomic,assign) BOOL      emphasized;
-@property(nonatomic,retain) id        context;//should this be assign?
+@property(nonatomic,copy)     NSString  *imgUrl;
+@property(nonatomic,assign)   BOOL      emphasized;
+@property(nonatomic,retain)   id        context;//should this be assign?
 @property(nonatomic,readonly) CGFloat padding;
-@property(nonatomic,retain) UILabel   *infoTextLabel;
-@property(nonatomic,retain) UIColor   *normalColor;
+@property(nonatomic,retain)   UILabel   *infoTextLabel;
+@property(nonatomic,retain)   UIColor   *normalColor;
 
 /*! 
  The designated initializer.

CLCGCell.m

@@ -184,14 +184,19 @@ -(void)showImage:(UIImage*)img
     [self setNeedsLayout]; //layout will happen in next update cycle
 
   [[self imageView] setImage:img];
-
-  // smooth out the appearance of the image a bit
-  CABasicAnimation *anim = [CABasicAnimation animationWithKeyPath:@"opacity"];
+
   CALayer *layer = [[self imageView] layer];
-  [anim setDuration:0.2]; //0.2 sec
-  [anim setFromValue:[NSNumber numberWithFloat:0.0]];
-  [anim setToValue:[NSNumber numberWithFloat:1.0]];
-  [layer addAnimation:anim forKey:@"animateOpacity"];
+
+  // smooth out the appearance of the image a bit but only if we are changing
+  // the image content. No need to animate if the image is the same.
+  if ([[self imageView] image] != img) {
+    CABasicAnimation *anim = [CABasicAnimation animationWithKeyPath:@"opacity"];
+    [anim setDuration:0.2]; //0.2 sec
+    [anim setFromValue:[NSNumber numberWithFloat:0.0]];
+    [anim setToValue:[NSNumber numberWithFloat:1.0]];
+    [layer addAnimation:anim forKey:@"animateOpacity"];
+  }
+
   [layer setOpacity:1.0]; //makes the animation ending value stick
 }