Ask HN: Is Twitter failing to send tweets too often?

I rarely use twitter directly (I use it through apps which use the API), but when I use the twitter.com, I feel like there's an "Oops, we did something wrong" error for every 3rd tweet I send.

Is it only me, or twitter are really having problems with sending tweets. And if so, does this affect the amount of users, or twitter are too big for users to pay attention to this problem?

(For the record, clients using the API don't have such a problem. Sadly, most of them will soon have to shut down due to the new policies)