diff --git a/src/server/PGFService.hs b/src/server/PGFService.hs
index ab968ecbf..35919d4ab 100644
--- a/src/server/PGFService.hs
+++ b/src/server/PGFService.hs
@@ -128,7 +128,9 @@ doTranslate pgf input mcat mfrom mto =
                                                             )]
                                                    | tree <- trees])]
     jsonParseOutput (PGF.ParseFailed _)  = []
-    jsonParseOutput (PGF.TypeError errs) = [("typeErrors",showJSON [show (PGF.ppTcError err) | (fid,err) <- errs])]
+    jsonParseOutput (PGF.TypeError errs) = [("typeErrors",showJSON [toJSObject [("fid", showJSON fid)
+                                                                               ,("msg", showJSON (show (PGF.ppTcError err)))
+                                                                               ] | (fid,err) <- errs])]
 
 -- used in phrasebook
 doTranslateGroup :: PGF -> String -> Maybe PGF.Type -> Maybe PGF.Language -> Maybe PGF.Language -> JSValue
@@ -198,7 +200,9 @@ doParse pgf input mcat mfrom = showJSON $ map toJSObject
   where
     jsonParseOutput (PGF.ParseOk trees)  = [("trees",showJSON trees)]
     jsonParseOutput (PGF.ParseFailed _)  = []
-    jsonParseOutput (PGF.TypeError errs) = [("typeErrors",showJSON [show (PGF.ppTcError err) | (fid,err) <- errs])]
+    jsonParseOutput (PGF.TypeError errs) = [("typeErrors",showJSON [toJSObject [("fid", showJSON fid)
+                                                                               ,("msg", showJSON (show (PGF.ppTcError err)))
+                                                                               ] | (fid,err) <- errs])]
 
 doComplete :: PGF -> String -> Maybe PGF.Type -> Maybe PGF.Language -> Maybe Int -> JSValue
 doComplete pgf input mcat mfrom mlimit = showJSON $ map toJSObject $ limit
@@ -328,7 +332,13 @@ instance JSON PGF.Expr where
 
 instance JSON PGF.BracketedString where
     readJSON x = return (PGF.Leaf "")
-    showJSON x = showJSON ""
+    showJSON (PGF.Bracket cat fid index _ bs)
+                          = showJSON $ toJSObject [("cat",      showJSON cat)
+                                                  ,("fid",      showJSON fid)
+                                                  ,("index",    showJSON index)
+                                                  ,("children", showJSON bs)
+                                                  ]
+    showJSON (PGF.Leaf s) = showJSON $ toJSObject [("token", s)]
 
 -- * PGF utilities
 
diff --git a/src/ui/gwt/Editor-compile b/src/ui/gwt/Editor-compile
index 4106298ea..d054d16ad 100644
--- a/src/ui/gwt/Editor-compile
+++ b/src/ui/gwt/Editor-compile
@@ -1,6 +1,8 @@
 #!/bin/sh
 
 APPDIR=`dirname $0`;
+GWT_DIR="/home/angelov/gwt-2.0.4"
+GWT_CLASSPATH="$GWT_DIR/gwt-user.jar:$GWT_DIR/gwt-dev.jar"
 
 if [ -z "$GWT_CLASSPATH" ]; then
   echo 'ERROR: $GWT_CLASSPATH is not set'
diff --git a/src/ui/gwt/Translate-compile b/src/ui/gwt/Translate-compile
index 220cf4a46..c2fbca65c 100644
--- a/src/ui/gwt/Translate-compile
+++ b/src/ui/gwt/Translate-compile
@@ -2,6 +2,9 @@
 
 APPDIR=`dirname $0`;
 
+GWT_DIR="/home/angelov/gwt-2.0.4"
+GWT_CLASSPATH="$GWT_DIR/gwt-user.jar:$GWT_DIR/gwt-dev.jar"
+
 if [ -z "$GWT_CLASSPATH" ]; then
   echo 'ERROR: $GWT_CLASSPATH is not set'
   echo 'Set $GWT_CLASSPATH to point to the GWT JAR files. For example:'
diff --git a/src/ui/gwt/src/org/grammaticalframework/ui/gwt/client/FridgeApp.java b/src/ui/gwt/src/org/grammaticalframework/ui/gwt/client/FridgeApp.java
index c54bb4ddb..886679b04 100644
--- a/src/ui/gwt/src/org/grammaticalframework/ui/gwt/client/FridgeApp.java
+++ b/src/ui/gwt/src/org/grammaticalframework/ui/gwt/client/FridgeApp.java
@@ -54,10 +54,10 @@ public class FridgeApp implements EntryPoint {
 						}
 
 					if (tr.getTypeErrors() != null)
-						for (String error : tr.getTypeErrors()) {
+						for (PGF.TcError error : tr.getTypeErrors()) {
 							SimplePanel panel = new SimplePanel();
 							panel.addStyleName("my-typeError");
-							panel.add(new HTML("<pre>"+error+"</pre>"));
+							panel.add(new HTML("<pre>"+error.getMsg()+"</pre>"));
 							outputPanel.add(panel);
 						}
 				}
diff --git a/src/ui/gwt/src/org/grammaticalframework/ui/gwt/client/PGF.java b/src/ui/gwt/src/org/grammaticalframework/ui/gwt/client/PGF.java
index 41e77539c..5a1a9e873 100644
--- a/src/ui/gwt/src/org/grammaticalframework/ui/gwt/client/PGF.java
+++ b/src/ui/gwt/src/org/grammaticalframework/ui/gwt/client/PGF.java
@@ -63,9 +63,9 @@ public class PGF {
 		protected TranslationResult() { }
 
 		public final native String getFrom() /*-{ return this.from; }-*/;
-		public final native String getBracketedString() /*-{ return this.brackets; }-*/;
+		public final native BracketedString getBracketedString() /*-{ return this.brackets; }-*/;
                 public final native IterableJsArray<Translation> getTranslations() /*-{ return this.translations; }-*/;
-		public final native String[] getTypeErrors() /*-{ return this.typeErrors; }-*/;
+		public final native TcError[] getTypeErrors() /*-{ return this.typeErrors; }-*/;
 	}
 
 	public static class Translation extends JavaScriptObject {
@@ -137,9 +137,27 @@ public class PGF {
 		protected ParseResult() { }
 
 		public final native String getFrom() /*-{ return this.from; }-*/;
-		public final native String getBracketedString() /*-{ return this.brackets; }-*/;
+		public final native BracketedString getBracketedString() /*-{ return this.brackets; }-*/;
 		public final native String[] getTrees() /*-{ return this.trees; }-*/;
-		public final native String[] getTypeErrors() /*-{ return this.typeErrors; }-*/;
+		public final native TcError[] getTypeErrors() /*-{ return this.typeErrors; }-*/;
+	}
+
+	public static class BracketedString extends JavaScriptObject {
+		protected BracketedString() { }
+
+		public final native String getToken() /*-{ return this.token; }-*/;
+
+		public final native String getCat() /*-{ return this.cat; }-*/;
+		public final native int getFId() /*-{ return this.fid; }-*/;
+		public final native int getIndex() /*-{ return this.index; }-*/;
+		public final native BracketedString[] getChildren() /*-{ return this.children; }-*/;
+	}
+
+	public static class TcError extends JavaScriptObject {
+		protected TcError() { }
+
+		public final native int getFId() /*-{ return this.fid; }-*/;
+		public final native String getMsg() /*-{ return this.msg; }-*/;
 	}
 
 	public String graphvizAbstractTree(String pgfURL, String abstractTree) {
diff --git a/src/ui/gwt/src/org/grammaticalframework/ui/gwt/client/TranslateApp.java b/src/ui/gwt/src/org/grammaticalframework/ui/gwt/client/TranslateApp.java
index d2ae216ec..2b65a2be7 100644
--- a/src/ui/gwt/src/org/grammaticalframework/ui/gwt/client/TranslateApp.java
+++ b/src/ui/gwt/src/org/grammaticalframework/ui/gwt/client/TranslateApp.java
@@ -66,13 +66,18 @@ public class TranslateApp implements EntryPoint {
 							}
 						}
 
-					if (tr.getTypeErrors() != null)
-						for (String error : tr.getTypeErrors()) {
-							SimplePanel panel = new SimplePanel();
+					if (tr.getTypeErrors() != null && tr.getTypeErrors().length > 0) {
+						for (PGF.TcError error : tr.getTypeErrors()) {
+							VerticalPanel panel = new VerticalPanel();
 							panel.addStyleName("my-typeError");
-							panel.add(new HTML("<pre>"+error+"</pre>"));
+							Label errLabel = new Label("Type Error");
+							errLabel.addStyleName("my-error-title");
+							HTML  msgHTML  = new HTML("<pre>"+error.getMsg()+"</pre>");
+							panel.add(errLabel);
+							panel.add(msgHTML);
 							outputPanel.add(panel);
 						}
+					}
 				}
 			}
 			public void onError (Throwable e) {
diff --git a/src/ui/gwt/src/org/grammaticalframework/ui/gwt/public/Translate.css b/src/ui/gwt/src/org/grammaticalframework/ui/gwt/public/Translate.css
index 49efa8c76..dd0ad3091 100644
--- a/src/ui/gwt/src/org/grammaticalframework/ui/gwt/public/Translate.css
+++ b/src/ui/gwt/src/org/grammaticalframework/ui/gwt/public/Translate.css
@@ -84,6 +84,10 @@
     cursor:pointer;
 }
 
+.my-error-title {
+    background: #DDDDDD;
+}
+
 .my-treeimage {
     width: 650px;
     height: 520px;