If i were you, i would not tell employer about this problem. from 09/26 to 10/01 is not a big deal. You will be fine.

以下是引用xqhiris在2004-10-3 15:40:57的发言：
到底什么时候毕业才是比较好啊？我打算明年年底毕业呢？！

It is recommend to start OPT after 10/01. Start H1-B application as early as possible.

以下是引用ygxue在2004-10-4 13:30:48的发言：
You are totally fine, take a 5 days vacation then.
Don't say anything right now

I believe it will be more difficult than this.

以下是引用HuangNiLuo在2004-10-5 14:39:13的发言：
为什么公司要求提出h1b申请才让我开始工作呢?不是可以用opt工作吗?
=> American may not understand opt etc. u can just explain to them that you've got one year work permit in hand. You only need H1 from next Oct.

I guess the major concern is I-9 form. OPT will allow you work for a year for sure. Somebody from HR did not understand.