I haven't see anything. I wish something could be done. Most of the threads start with the suggestion to confirm credentials, ensure using an email address if you have a newer style account, and/or changing the password. Alternate suggestions are deleting the password, having it not save the password, confirming the launcher hasn't added additional characters etc. Frustrating though, as these do not correct this issue for a lot of people. I still have the best luck with the force update, works about half the time, though with our net connection, its a half hour per attempt. My kids can't take advantage of the minecraft time they have earned for this evening, as having exited minecraft and rebooting their computers earlier in the day, the error is here again, and their bedtime fast approaches.
The vanilla launcher always working makes things worse, as it teases them with the fact that yes, the credentials, account, and mojang server are fine; the problem is the modded minecraft launcher. Too bad modded minecraft is so much more entertaining, and the ftb launcher so convenient. The kids won't play vanilla anymore, too boring. *shrug*
This problem really used to be a rare occurence, now though, the old solutions do not resolve the issue, and the error frequency is simply out of control the last little bit.