Primefaces fileupload - unstable with chrome

[KingdomHeart]

Sometimes, fileUpload event will not fired under chrome. Work great with FF and Safari. Here is my bizarre my problem is. I test fileupload locally on both FF and chrome. Work great. Upload it to the server, now on FF work, chrome doesnt. Wait for a while, all the sudden, fileupload on chrome start to work. I ask my friend to test on his machine, his fileupload on his chrome does not work, FF work though.

I dont know how to reproduce the problem, I am just asking if anyone experience the same problem as I am.