這一行就寫得粉明暸了。如果msn的選項中有勾選"只允許在我名單中的人可以看見我及專送訊息"。 MSN Checker 可能也無法查出實際的Status.

Does it show 100% correct status?
Yes, but we do not guarantee it. As on January 16, 2004, Microsoft has patched the method which MSN Status Checker was using, Now if the person has "Only people in my allow list can see my status and send me messages" option enabled, then you will see them offline. And we cant do anything with this.