Up until last week, when ever I was logged into multiple accounts in Google and I invoked the OAuth2.0 flow I would get to an ugly screen (looked like it had been hit repeat
We (google) are rolling back the new page and within a few minutes it should return to the previous behavior.
Any chance you could let us know what kinds of accounts those 4 you were logged in to were? SAML? Google Apps? Plain gmail?
FYI, we just rolled out the new UI, so you may begin to see the "beautiful screen" that is now functional. :-) Thanks for the bug report.
We're also experiencing this. Hope someone at Google takes note and gets this fixed soon!
EDIT: To clarify, I've only experienced the problem when logged into both a personal Google account AND a Google apps account. Haven't tested other situations at present.