[Timothee]

Actually it's worse than that. You're not happy with the fact that the Search input is too close to the "Sign in" text.

But the "Sign in" page asks you to type your name and then be offered the "sign in with…" option you used when joining.

So, the only thing it does is removing one button. (Twitter or Facebook) At this point, you still have to enter your login information for Facebook or Twitter.

A better solution IMO is to present directly "Sign in with Twitter" and "Sign in with Facebook". One thing you might be worried about is people who first joined with one and try to sign in with the other: does that create a new separate account? Do you put a warning? etc. But you can curb that by keeping a cookie of the sign-in method used and present that one with an option to see the other options. That's what RPXNow is doing IIRC (https://rpxnow.com/).