Updated Packer - the current version was working incorrectly.

build/js/Packer.js

 /*
-	Packer version 3.0 (beta 5) - copyright 2004-2007, Dean Edwards
+	Packer version 3.0 (beta 8) - copyright 2004-2007, Dean Edwards
 	http://www.opensource.org/licenses/mit-license
 */
 
@@ -13,14 +13,14 @@ var WORDS = /\w+/g;
 var Packer = Base.extend({
 	minify: function(script) {
 		script = script.replace(Packer.CONTINUE, "");
-		script = Packer.clean.exec(script);
+		script = Packer.data.exec(script);
 		script = Packer.whitespace.exec(script);
-		script = Packer.clean.exec(script); // seem to grab a few more bytes on the second pass
+		script = Packer.clean.exec(script);
 		return script;
 	},
 	
 	pack: function(script, base62, shrink) {
-		script = this.minify(script);
+		script = this.minify(script + "\n");
 		if (shrink) script = this._shrinkVariables(script);
 		if (base62) script = this._base62Encode(script);	
 		return script;
@@ -59,8 +59,13 @@ var Packer = Base.extend({
 		};
 		
 		var data = []; // encoded strings and regular expressions
+		var REGEXP = /^[^'"]\//;
 		var store = function(string) {
 			var replacement = "#" + data.length;
+			if (REGEXP.test(string)) {
+				replacement = string.charAt(0) + replacement;
+				string = string.slice(1);
+			}
 			data.push(string);
 			return replacement;
 		};
@@ -74,7 +79,7 @@ var Packer = Base.extend({
 		// identify blocks, particularly identify function blocks (which define scope)
 		var BLOCK = /(function\s*[\w$]*\s*\(\s*([^\)]*)\s*\)\s*)?(\{([^{}]*)\})/;
 		var VAR_ = /var\s+/g;
-		var VAR_NAME = /var\s+[\w$]{2,}/g; // > 1 char
+		var VAR_NAME = /var\s+[\w$]+/g;
 		var COMMA = /\s*,\s*/;
 		var blocks = []; // store program blocks (anything between braces {})
 		// encoder for program blocks
@@ -93,8 +98,9 @@ var Packer = Base.extend({
 				// process each identifier
 				var count = 0, shortId;
 				forEach (ids, function(id) {
-					id = rescape(trim(id));
-					if (id) {
+					id = trim(id);
+					if (id && id.length > 1) { // > 1 char
+						id = rescape(id);
 						// find the next free short name (check everything in the current scope)
 						do shortId = encode52(count++);
 						while (new RegExp("[^\\w$.]" + shortId + "[^\\w$:]").test(block));
@@ -106,13 +112,13 @@ var Packer = Base.extend({
 					}
 				});
 			}
-			var replacement = "~" + blocks.length;
+			var replacement = "~" + blocks.length + "~";
 			blocks.push(block);
 			return replacement;
 		};
 		
 		// decoder for program blocks
-		var ENCODED = /~(\d+)/;
+		var ENCODED = /~(\d+)~/;
 		var decode = function(script) {
 			while (ENCODED.test(script)) {
 				script = script.replace(global(ENCODED), function(match, index) {
@@ -158,16 +164,15 @@ var Packer = Base.extend({
 			"replace(new RegExp('\\\\b'+e(c)+'\\\\b','g'),k[c]);return p}('%1',%2,%3,'%4'.split('|'),0,{}))",
 	
 	init: function() {
-		this.data = reduce(this.data, new RegGrp, function(data, replacement, expression) {
+		this.data = reduce(this.data, function(data, replacement, expression) {
 			data.store(this.javascript.exec(expression), replacement);
 			return data;
-		}, this);
+		}, new RegGrp, this);
 		this.clean = this.data.union(this.clean);
 		this.whitespace = this.data.union(this.whitespace);
 	},
 	
 	clean: {
-		";;;[^\\n]*": REMOVE, // triple semi-colons treated like line comments
 		"\\(\\s*;\\s*;\\s*\\)": "(;;)", // for (;;) loops
 		"throw[^};]+[};]": IGNORE, // a safari 1.3 bug
 		";+\\s*([};])": "$1"
@@ -178,17 +183,16 @@ var Packer = Base.extend({
 		"STRING1": IGNORE,
 		'STRING2': IGNORE,
 		"CONDITIONAL": IGNORE, // conditional comments
-		"(COMMENT1)\\n\\s*(REGEXP)?": "\n$2",
+		"(COMMENT1)\\n\\s*(REGEXP)?": "\n$3",
 		"(COMMENT2)\\s*(REGEXP)?": " $3",
-		"COMMENT1$": REMOVE,
 		"([\\[(\\^=,{}:;&|!*?])\\s*(REGEXP)": "$1$2"
 	},
 	
 	javascript: new RegGrp({
-		COMMENT1:    /\/\/[^\n]*/.source,
+		COMMENT1:    /(\/\/|;;;)[^\n]*/.source,
 		COMMENT2:    /\/\*[^*]*\*+([^\/][^*]*\*+)*\//.source,
 		CONDITIONAL: /\/\*@|@\*\/|\/\/@[^\n]*\n/.source,
-		REGEXP:      /\/(\\\/|[^*\/])(\\.|[^\/\n\\])*\//.source,
+		REGEXP:      /\/(\\[\/\\]|[^*\/])(\\.|[^\/\n\\])*\/[gim]*/.source,
 		STRING1:     /'(\\.|[^'\\])*'/.source,
 		STRING2:     /"(\\.|[^"\\])*"/.source
 	}),

build/js/base2.js

-// timestamp: Tue, 24 Apr 2007 09:57:15
+// timestamp: Tue, 01 May 2007 19:13:00
 /*
 	base2.js - copyright 2007, Dean Edwards
 	http://www.opensource.org/licenses/mit-license
@@ -141,6 +141,12 @@ var assertType = function(object, type, message) {
 	}
 };
 
+var copy = function(object) {
+	var fn = new Function;
+	fn.prototype = object;
+	return new fn;
+};
+
 var format = function(string) {
 	// replace %n with arguments[n]
 	// e.g. format("%1 %2%3 %2a %1%3", "she", "se", "lls");
@@ -416,12 +422,12 @@ var Enumerable = Module.extend({
 	},
 	
 	filter: function(object, test, context) {
-		return this.reduce(object, new Array2, function(result, value, key) {
+		return this.reduce(object, function(result, value, key) {
 			if (test.call(context, value, key, object)) {
 				result[result.length] = value;
 			}
 			return result;
-		});
+		}, new Array2);
 	},
 
 	invoke: function(object, method) {
@@ -448,7 +454,7 @@ var Enumerable = Module.extend({
 		});
 	},
 	
-	reduce: function(object, result, block, context) {
+	reduce: function(object, block, result, context) {
 		this.forEach (object, function(value, key) {
 			result = block.call(context, result, value, key, object);
 		});
@@ -475,10 +481,10 @@ var IArray = Module.extend({
 	combine: function(keys, values) {
 		// combine two arrays to make a hash
 		if (!values) values = keys;
-		return this.reduce(keys, {}, function(object, key, index) {
+		return this.reduce(keys, function(object, key, index) {
 			object[key] = values[index];
 			return object;
-		});
+		}, {});
 	},
 	
 	copy: function(array) {
@@ -904,20 +910,20 @@ var Namespace = Base.extend({
 		
 		var namespace = "var base=" + base + ";";
 		var imports = ("base2,lang," + this.imports).split(",");
-		_private.imports = Enumerable.reduce(imports, namespace, function(namespace, name) {
+		_private.imports = Enumerable.reduce(imports, function(namespace, name) {
 			if (base2[name]) namespace += base2[name].namespace;
 			return namespace;
-		});
+		}, namespace);
 		
 		var namespace = format("base2.%1=%1;", this.name);
 		var exports = this.exports.split(",");
-		_private.exports = Enumerable.reduce(exports, namespace, function(namespace, name) {
+		_private.exports = Enumerable.reduce(exports, function(namespace, name) {
 			if (name) {
 				this.namespace += format("var %2=%1.%2;", this.name, name);
 				namespace += format("if(!%1.%2)%1.%2=%2;base2.%2=%1.%2;", this.name, name);
 			}
 			return namespace;
-		}, this);
+		}, namespace, this);
 		
 		if (this.name != "base2") {
 			base2.namespace += format("var %1=base2.%1;", this.name);
@@ -949,7 +955,7 @@ eval(this.exports);
 var lang = new Namespace(this, {
 	name:    "lang",
 	version: base2.version,
-	exports: "K,assert,assertType,assignID,instanceOf,extend,format,forEach,match,rescape,slice,trim",
+	exports: "K,assert,assertType,assignID,copy,instanceOf,extend,format,forEach,match,rescape,slice,trim",
 	
 	init: function() {
 		this.extend = extend;