diff --git a/lib/ace/document.js b/lib/ace/document.js
index 32ae57a9..3dbb438e 100644
--- a/lib/ace/document.js
+++ b/lib/ace/document.js
@@ -665,7 +665,7 @@ var Document = function(text, mode) {
         if (firstRow <= 0) return 0;
 
         var removed = this.lines.slice(firstRow, lastRow + 1);
-        this.$remove(new Range(firstRow-1, this.lines[firstRow-1], lastRow, this.lines[lastRow].length));
+        this.$remove(new Range(firstRow-1, this.lines[firstRow-1].length, lastRow, this.lines[lastRow].length));
         this.$insertLines(firstRow - 1, removed);
         
         this.fireChangeEvent(firstRow - 1, lastRow);
diff --git a/lib/ace/test/document_test.js b/lib/ace/test/document_test.js
index fd5995da..9b24c404 100644
--- a/lib/ace/test/document_test.js
+++ b/lib/ace/test/document_test.js
@@ -81,35 +81,35 @@ var Test = {
     },
 
     "test: move lines down" : function() {
-        var doc = new Document(["1", "2", "3", "4"]);
+        var doc = new Document(["a1", "a2", "a3", "a4"]);
         
         doc.moveLinesDown(0, 1);
-        assert.equal(doc.toString(), ["3", "1", "2", "4"].join("\n"));
+        assert.equal(doc.toString(), ["a3", "a1", "a2", "a4"].join("\n"));
         
         doc.moveLinesDown(1, 2);
-        assert.equal(doc.toString(), ["3", "4", "1", "2"].join("\n"));
+        assert.equal(doc.toString(), ["a3", "a4", "a1", "a2"].join("\n"));
         
         doc.moveLinesDown(2, 3);
-        assert.equal(doc.toString(), ["3", "4", "1", "2"].join("\n"));
+        assert.equal(doc.toString(), ["a3", "a4", "a1", "a2"].join("\n"));
         
         doc.moveLinesDown(2, 2);
-        assert.equal(doc.toString(), ["3", "4", "2", "1"].join("\n"));
+        assert.equal(doc.toString(), ["a3", "a4", "a2", "a1"].join("\n"));
     },
 
     "test: move lines up" : function() {
-        var doc = new Document(["1", "2", "3", "4"]);
+        var doc = new Document(["a1", "a2", "a3", "a4"]);
 
         doc.moveLinesUp(2, 3);
-        assert.equal(doc.toString(), ["1", "3", "4", "2"].join("\n"));
+        assert.equal(doc.toString(), ["a1", "a3", "a4", "a2"].join("\n"));
         
         doc.moveLinesUp(1, 2);
-        assert.equal(doc.toString(), ["3", "4", "1", "2"].join("\n"));
+        assert.equal(doc.toString(), ["a3", "a4", "a1", "a2"].join("\n"));
         
         doc.moveLinesUp(0, 1);
-        assert.equal(doc.toString(), ["3", "4", "1", "2"].join("\n"));
+        assert.equal(doc.toString(), ["a3", "a4", "a1", "a2"].join("\n"));
         
         doc.moveLinesUp(2, 2);
-        assert.equal(doc.toString(), ["3", "1", "4", "2"].join("\n"));
+        assert.equal(doc.toString(), ["a3", "a1", "a4", "a2"].join("\n"));
     },
 
     "test: duplicate lines" : function() {