diff --git a/resources/frame_compute_method.jpg b/resources/frame_compute_method.jpg
new file mode 100644
index 0000000..d65bd7f
Binary files /dev/null and b/resources/frame_compute_method.jpg differ
diff --git a/resources/frame_power_detection.jpg b/resources/frame_power_detection.jpg
new file mode 100644
index 0000000..caf1d75
Binary files /dev/null and b/resources/frame_power_detection.jpg differ
diff --git a/src/com/sheepit/client/Client.java b/src/com/sheepit/client/Client.java
index 77b1f89..1dbbc6b 100644
--- a/src/com/sheepit/client/Client.java
+++ b/src/com/sheepit/client/Client.java
@@ -329,9 +329,6 @@ public class Client {
 						gui.error("Client::run problem with confirmJob (returned " + ret + ")");
 						sendError(step);
 					}
-					else {
-						gui.AddFrameRendered();
-					}
 				}
 				else {
 					this.jobsToValidate.add(this.renderingJob);
@@ -446,9 +443,6 @@ public class Client {
 					this.log.debug("Client::senderLoop confirm failed, ret: " + ret);
 					sendError(step);
 				}
-				else {
-					gui.AddFrameRendered();
-				}
 			}
 			catch (InterruptedException e) {
 			}
@@ -795,15 +789,17 @@ public class Client {
 				}
 			}
 		}
+
 		this.isValidatingJob = false;
+		this.previousJob = ajob;
+
+		gui.AddFrameRendered();
 		
 		// we can remove the frame file
 		File frame = new File(ajob.getOutputImagePath());
 		frame.delete();
 		ajob.setOutputImagePath(null);
-		
-		this.isValidatingJob = false;
-		this.previousJob = ajob;
+
 		return Error.Type.OK;
 	}
 	
diff --git a/src/com/sheepit/client/Server.java b/src/com/sheepit/client/Server.java
index cdfd4a8..efd2fcd 100644
--- a/src/com/sheepit/client/Server.java
+++ b/src/com/sheepit/client/Server.java
@@ -686,42 +686,6 @@ public class Server extends Thread implements HostnameVerifier, X509TrustManager
 		return ServerCode.UNKNOWN;
 	}
 	
-	public byte[] getLastRender() {
-		try {
-			HttpURLConnection httpCon = this.HTTPRequest(this.getPage("last-render-frame"));
-			
-			InputStream inStrm = httpCon.getInputStream();
-			if (httpCon.getResponseCode() != HttpURLConnection.HTTP_OK) {
-				this.log.debug("Server::getLastRender code not ok " + httpCon.getResponseCode());
-				return null;
-			}
-			int size = httpCon.getContentLength();
-			
-			if (size <= 0) {
-				this.log.debug("Server::getLastRender size is negative (size: " + size + ")");
-				return null;
-			}
-			
-			byte[] ret = new byte[size];
-			byte[] ch = new byte[512 * 1024];
-			int n = 0;
-			int i = 0;
-			while ((n = inStrm.read(ch)) != -1) {
-				System.arraycopy(ch, 0, ret, i, n);
-				i += n;
-			}
-			inStrm.close();
-			return ret;
-		}
-		catch (Exception e) {
-			StringWriter sw = new StringWriter();
-			PrintWriter pw = new PrintWriter(sw);
-			e.printStackTrace(pw);
-			this.log.debug("Server::getLastRender Exception " + e + " stacktrace: " + sw.toString());
-		}
-		return null;
-	}
-	
 	private String generateXMLForMD5cache() {
 		List<FileMD5> md5s = new ArrayList<>();
 		for (File local_file : this.user_config.getLocalCacheFiles()) {
diff --git a/src/com/sheepit/client/standalone/swing/activity/Working.java b/src/com/sheepit/client/standalone/swing/activity/Working.java
index 2c0b116..f4b3b40 100644
--- a/src/com/sheepit/client/standalone/swing/activity/Working.java
+++ b/src/com/sheepit/client/standalone/swing/activity/Working.java
@@ -27,9 +27,9 @@ import java.awt.GridLayout;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 import java.awt.image.BufferedImage;
-import java.io.ByteArrayInputStream;
+import java.awt.Image;
+import java.io.File;
 import java.io.IOException;
-import java.io.InputStream;
 import java.text.DecimalFormat;
 import java.util.Date;
 
@@ -46,11 +46,8 @@ import javax.swing.SpringLayout;
 
 import com.sheepit.client.Client;
 import com.sheepit.client.Job;
-import com.sheepit.client.RenderProcess;
-import com.sheepit.client.Server;
 import com.sheepit.client.Stats;
 import com.sheepit.client.Utils;
-import com.sheepit.client.os.OS;
 import com.sheepit.client.standalone.GuiSwing;
 import com.sheepit.client.standalone.GuiSwing.ActivityType;
 
@@ -307,28 +304,44 @@ public class Working implements Activity {
 		Client client = parent.getClient();
 		if (client != null) {
 			Job lastJob = client.getPreviousJob();
-			Server server = client.getServer();
-			if (server != null) {
-				byte[] data = server.getLastRender();
-				if (data != null) {
-					InputStream is = new ByteArrayInputStream(data);
+			if (lastJob != null) {
+				ImageIcon icon = null;
+				int idInt = Integer.parseInt(lastJob.getId());
+				if (idInt == 1) {
+					icon = new ImageIcon(getClass().getResource("/frame_compute_method.jpg"));
+				}
+				else if (idInt < 20) {
+					icon = new ImageIcon(getClass().getResource("/frame_power_detection.jpg"));
+				}
+				else {
 					try {
-						BufferedImage image = ImageIO.read(is);
-						if (image != null) {
-							lastRender.setIcon(new ImageIcon(image));
-							if (lastJob != null) {
-								// don't use lastJob.getProcessRender().getDuration() due to timezone
-								if (lastJob.getProcessRender().getDuration() > 1) {
-									lastRenderTime.setText("Render time : " + Utils.humanDuration(new Date(lastJob.getProcessRender().getEndTime() - lastJob.getProcessRender().getStartTime())));
-								}
-							}
+						String path = lastJob.getOutputImagePath();
+
+						BufferedImage img = ImageIO.read(new File(path));
+						float width = img.getWidth();
+						float height = img.getHeight();
+						float factor = 1.0f;
+						if (height > 200) {
+							factor = 200f / height;
 						}
+						if (width * factor > 200) {
+							factor = Math.min(factor, 200f / width);
+						}
+						icon = new ImageIcon(img.getScaledInstance((int)(width * factor), (int)(height * factor), Image.SCALE_FAST));
 					}
 					catch (IOException e) {
 						System.out.println("Working::showLastRender() exception " + e);
 						e.printStackTrace();
 					}
 				}
+
+				if (icon != null) {
+					lastRender.setIcon(icon);
+					// don't use lastJob.getProcessRender().getDuration() due to timezone
+					if (lastJob.getProcessRender().getDuration() > 1) {
+						lastRenderTime.setText("Render time : " + Utils.humanDuration(new Date(lastJob.getProcessRender().getEndTime() - lastJob.getProcessRender().getStartTime())));
+					}
+				}
 			}
 		}