This is a nice trick in order to fix the above error.

Open up your favourite browser, *cough* Firefox *cough*, and point it to ‘https://contacts.msn.com/‘ url.

You will see a ‘Directory Listing Denied”, but that’s not the reason we are there ;)

Now click on the blue certificate section in url (it says ‘msn.com’)

then go to ‘More information’,

‘View Certificate’,

‘Details tab’

and finally ‘Export’ button.

Save the certificate into the ‘~/.purple/certificates/x509/tls_peers/’ folder, and disable/enable your MSN account in Pidgin.