I have fixed the Mint authentication problem in Mojito. See the previous post for more details on the issue.
You must now connect Mojito to an active Mint session, which means you must log in to Mint in a separate window first, then copy the HTTP headers from the Mint page over to Mojito. I know this is not convenient, but this is the only solution I have gotten to work. If you are like me, you are desperate to get your account data from Mint so you can manage your finances better; and this somewhat cumbersome work-around is certainly better than having to scrap Mojito altogether. The details for the new authentication process are described on the Mint Authentication Steps page.
To upgrade your copy of Mojito, follow the easy steps on the FAQ page.
Cheers,
-b3