We’re working on a bug whereby the default avatar is showing up for users who have previously uploaded their own image. We hope to resolve this soon.
Update (5:30p): We’ve identified the root cause of this problem and expect the issue to be resolved within the next several hours.
We are currently working on a critical bug whereby some tweets from users you follow may not appear in your timeline. This bug particularly affects the delivery of tweets from users you follow that themselves have a large number of followers.
We plan on deploying the first part of the fix for this bug tomorrow morning and will update status thereafter.
Update: We deployed a fix for one of the underlying problems and are assessing its success.
As we noted in our blog post, we are emailing all users about the change in our Terms. This means that if you have registered multiple accounts on Twitter, you will get multiple emails from us.
