diff --git a/bower.json b/bower.json
index dfbe7e1ba..6a9705157 100644
--- a/bower.json
+++ b/bower.json
@@ -1,6 +1,6 @@
 {
   "name": "pdfjs-dist",
-  "version": "1.0.499",
+  "version": "1.0.501",
   "keywords": [
     "Mozilla",
     "pdf",
diff --git a/build/pdf.combined.js b/build/pdf.combined.js
index 0a968fdc5..971a4b374 100644
--- a/build/pdf.combined.js
+++ b/build/pdf.combined.js
@@ -21,8 +21,8 @@ if (typeof PDFJS === 'undefined') {
   (typeof window !== 'undefined' ? window : this).PDFJS = {};
 }
 
-PDFJS.version = '1.0.499';
-PDFJS.build = '2e47b58';
+PDFJS.version = '1.0.501';
+PDFJS.build = '6038ee7';
 
 (function pdfjsWrapper() {
   // Use strict in our context only - users might not want it
@@ -34359,6 +34359,8 @@ var PostScriptLexer = (function PostScriptLexerClosure() {
   function PostScriptLexer(stream) {
     this.stream = stream;
     this.nextChar();
+
+    this.strBuf = [];
   }
   PostScriptLexer.prototype = {
     nextChar: function PostScriptLexer_nextChar() {
@@ -34399,11 +34401,15 @@ var PostScriptLexer = (function PostScriptLexerClosure() {
           return PostScriptToken.RBRACE;
       }
       // operator
-      var str = String.fromCharCode(ch);
+      var strBuf = this.strBuf;
+      strBuf.length = 0;
+      strBuf[0] = String.fromCharCode(ch);
+
       while ((ch = this.nextChar()) >= 0 && // and 'A'-'Z', 'a'-'z'
              ((ch >= 0x41 && ch <= 0x5A) || (ch >= 0x61 && ch <= 0x7A))) {
-        str += String.fromCharCode(ch);
+        strBuf.push(String.fromCharCode(ch));
       }
+      var str = strBuf.join('');
       switch (str.toLowerCase()) {
         case 'if':
           return PostScriptToken.IF;
@@ -34415,16 +34421,19 @@ var PostScriptLexer = (function PostScriptLexerClosure() {
     },
     getNumber: function PostScriptLexer_getNumber() {
       var ch = this.currentChar;
-      var str = String.fromCharCode(ch);
+      var strBuf = this.strBuf;
+      strBuf.length = 0;
+      strBuf[0] = String.fromCharCode(ch);
+
       while ((ch = this.nextChar()) >= 0) {
         if ((ch >= 0x30 && ch <= 0x39) || // '0'-'9'
             ch === 0x2D || ch === 0x2E) { // '-', '.'
-          str += String.fromCharCode(ch);
+          strBuf.push(String.fromCharCode(ch));
         } else {
           break;
         }
       }
-      var value = parseFloat(str);
+      var value = parseFloat(strBuf.join(''));
       if (isNaN(value)) {
         error('Invalid floating point number: ' + value);
       }
diff --git a/build/pdf.js b/build/pdf.js
index 861e2b02f..53cdfb887 100644
--- a/build/pdf.js
+++ b/build/pdf.js
@@ -21,8 +21,8 @@ if (typeof PDFJS === 'undefined') {
   (typeof window !== 'undefined' ? window : this).PDFJS = {};
 }
 
-PDFJS.version = '1.0.499';
-PDFJS.build = '2e47b58';
+PDFJS.version = '1.0.501';
+PDFJS.build = '6038ee7';
 
 (function pdfjsWrapper() {
   // Use strict in our context only - users might not want it
diff --git a/build/pdf.worker.js b/build/pdf.worker.js
index 702386ba7..3bc8219d8 100644
--- a/build/pdf.worker.js
+++ b/build/pdf.worker.js
@@ -21,8 +21,8 @@ if (typeof PDFJS === 'undefined') {
   (typeof window !== 'undefined' ? window : this).PDFJS = {};
 }
 
-PDFJS.version = '1.0.499';
-PDFJS.build = '2e47b58';
+PDFJS.version = '1.0.501';
+PDFJS.build = '6038ee7';
 
 (function pdfjsWrapper() {
   // Use strict in our context only - users might not want it
@@ -29500,6 +29500,8 @@ var PostScriptLexer = (function PostScriptLexerClosure() {
   function PostScriptLexer(stream) {
     this.stream = stream;
     this.nextChar();
+
+    this.strBuf = [];
   }
   PostScriptLexer.prototype = {
     nextChar: function PostScriptLexer_nextChar() {
@@ -29540,11 +29542,15 @@ var PostScriptLexer = (function PostScriptLexerClosure() {
           return PostScriptToken.RBRACE;
       }
       // operator
-      var str = String.fromCharCode(ch);
+      var strBuf = this.strBuf;
+      strBuf.length = 0;
+      strBuf[0] = String.fromCharCode(ch);
+
       while ((ch = this.nextChar()) >= 0 && // and 'A'-'Z', 'a'-'z'
              ((ch >= 0x41 && ch <= 0x5A) || (ch >= 0x61 && ch <= 0x7A))) {
-        str += String.fromCharCode(ch);
+        strBuf.push(String.fromCharCode(ch));
       }
+      var str = strBuf.join('');
       switch (str.toLowerCase()) {
         case 'if':
           return PostScriptToken.IF;
@@ -29556,16 +29562,19 @@ var PostScriptLexer = (function PostScriptLexerClosure() {
     },
     getNumber: function PostScriptLexer_getNumber() {
       var ch = this.currentChar;
-      var str = String.fromCharCode(ch);
+      var strBuf = this.strBuf;
+      strBuf.length = 0;
+      strBuf[0] = String.fromCharCode(ch);
+
       while ((ch = this.nextChar()) >= 0) {
         if ((ch >= 0x30 && ch <= 0x39) || // '0'-'9'
             ch === 0x2D || ch === 0x2E) { // '-', '.'
-          str += String.fromCharCode(ch);
+          strBuf.push(String.fromCharCode(ch));
         } else {
           break;
         }
       }
-      var value = parseFloat(str);
+      var value = parseFloat(strBuf.join(''));
       if (isNaN(value)) {
         error('Invalid floating point number: ' + value);
       }
diff --git a/package.json b/package.json
index 816a133aa..ec675c0d2 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "pdfjs-dist",
-  "version": "1.0.499",
+  "version": "1.0.501",
   "description": "Generic build of Mozilla's PDF.js library.",
   "keywords": [
     "Mozilla",