Hotmail on Safari

[TheMagicPirate]

Since switching to my Mac I have only ever had one problem. My hotmail email from Microsoft Messenger.

Messenger tells me I have emails (even about the ones in my other folders witch the Windows version doesn't) but when I click the 'Mail' button, the email page only opens successfully about half of the time.
I get the message

Windows Live ID is unavailable from this site for one of the following reasons:
This site may be experiencing a problem.
The site may not be a member of Windows Live ID.

Am I just being paranoid in thinking that this is MS's way of being petty?

EDIT: It opens first time every-time in Firefox...