New Post: Tweet Length

I get the following error from Twitter: Status is over 140 characters

This happens to two different tweets, but both are exactly 140 chars. They do both contain links in case that is a factor.

I get this error when I post with: Tweetinvi.Tweet.PublishTweet(text).

I've been trying to figure this out on my own, but I'm a bit stuck. When I do the following:
var t = Tweetinvi.Tweet.CreateTweet(text);
t.Length = 43, even though the "text" parameter passed in is 140 characters.

If someone could point me in the right direction I'd appreciate it.