@@ -214,16 +214,10 @@
       /** Prepend context to the start of the next diff chunk. */
       NextUp: -1,
       /** Process the next queued action. */
       ProcessQueue: 0x7fffffff
     },
-    config: {
-      /*
-      glyphUp: '⇡', //'&#uarr;',
-      glyphDown: '⇣' //'&#darr;'
-      */
-    },
 
     /**
        Creates and returns a button element for fetching a chunk in
        the given fetchType (as documented for fetchChunk()).
     */
@@ -527,21 +521,23 @@
       if(fetchType===this.FetchType.NextUp && !this.pos.next
         || fetchType===this.FetchType.PrevDown && !this.pos.prev){
         console.error("Attempt to fetch diff lines but don't have any.");
         return this;
       }
-      this.msg(false);
+      this.msg(false,"Fetching diff chunk...");
+      const self = this;
       const fOpt = {
         urlParams:{
           name: this.fileHash, from: 0, to: 0
         },
+        aftersend: ()=>this.msg(false),
         onload: function(list){
-          this.injectResponse(fetchType,up,list);
-          if( !this.$fetchQueue || this.$fetchQueue.length==0 ) return;
-          this.$fetchQueue.shift();
-          setTimeout(this.fetchChunk.bind(this,this.FetchType.ProcessQueue));
-        }.bind(this)
+          self.injectResponse(fetchType,up,list);
+          if( !self.$fetchQueue || self.$fetchQueue.length==0 ) return;
+          self.$fetchQueue.shift();
+          setTimeout(self.fetchChunk.bind(self,self.FetchType.ProcessQueue));
+        }
       };
       const up = fOpt.urlParams;
       if(fetchType===this.FetchType.FillGap){
         /* Easiest case: filling a whole gap. */
         up.from = this.pos.startLhs;
@@ -572,13 +568,13 @@
           fetchType = this.FetchType.FillGap;
         }
       }
       //console.debug("fetchChunk(",fetchType,")",up);
       fOpt.onerror = function(err){
-        this.msg(true,err.message);
-        this.$fetchQueue = [];
-      }.bind(this);
+        self.msg(true,err.message);
+        self.$fetchQueue = [];
+      };
       Diff.fetchArtifactChunk(fOpt);
       return this;
     }
   };