My name is Oleg and represent the uCoz website builder (http://www.ucoz.com). We have found a problem when using your API. The problem is as follows: our module of automatic reposting to Twitter has stopped shortening links with t.co as it did earlier and as described in your documentation (https://dev.twitter.com/docs/api/1.1/post/statuses/update).
Therefore entries are not reposted and give out an error “Status is over 140 characters”. Please comment on the issue: is the problem at your side or are any actions required from our side?