image cache is cleared after downloading images. now you won't have to restart magarena if the image cache was set to 'missing image' for a card and you download it

src/magic/data/CardImagesProvider.java

@@ -23,4 +23,5 @@ public interface CardImagesProvider {
             final int index,
             final boolean high);
 
+	void clearCache();
 }

src/magic/data/HighQualityCardImagesProvider.java

@@ -71,4 +71,9 @@ public class HighQualityCardImagesProvider implements CardImagesProvider {
 	public static CardImagesProvider getInstance() {
 		return INSTANCE;
 	}
+	
+	public void clearCache() {		
+		origImages.clear();
+		scaledImages.clear();
+	}
 }

src/magic/ui/DownloadImagesDialog.java

@@ -172,6 +172,9 @@ public class DownloadImagesDialog extends JDialog implements Runnable,ActionList
                 }
             });
         }
+			
+		// clear images that are set to "missing image" in cache
+		magic.data.HighQualityCardImagesProvider.getInstance().clearCache();
                 
         IconImages.reloadSymbols();