fs.watch/fs.writeFileSync win vs ubuntu

Results_ubuntu_10.04__node_0.5.10.txt

$ node lib/test.js 
fs.writeFileSync:  /tmp/test.txt
fs.watch: /tmp/test.txt
fs.writeFileSync: /tmp/test.txt
>> fs.watch CALLBACK: change test.txt
FSWatcher.close()

Results_win_7__node_0.5.10.txt

C:\projects\test>node test.js
fs.writeFileSync:  C:\Users\pwong\AppData\Local\Temp\test.txt
fs.watch: C:\Users\pwong\AppData\Local\Temp\test.txt
fs.writeFileSync: C:\Users\pwong\AppData\Local\Temp\test.txt
>> fs.watch CALLBACK: change test.txt
>> fs.watch CALLBACK: change test.txt
FSWatcher.close()
>> fs.watch CALLBACK: change null

watchTest.js

var fs = require("fs"),
   file = require("path").resolve((process.env.TEMP || "/tmp") + "/test.txt"),
   L = console.log.bind(console);

L("fs.writeFileSync: ",file);
fs.writeFileSync(file, "");

L("fs.watch:",file);
var tmpw = fs.watch(file, function(ev,fname){
 L(">> fs.watch CALLBACK:", ev, fname);
});

setTimeout(function(){
 L("fs.writeFileSync:", file);
 fs.writeFileSync(file, "one");
},100);

setTimeout(function(){
 L("FSWatcher.close()");
 tmpw.close();
}, 1000);