Twitter postings not displaying tweet correctly

I have a Twitter module that has been running fine on our website,
but the last 2 tweets have a section replaced by a bunch of code in the middle, it hasn't done this before and The tweet displays correctly on Twitter's own website.
The first tweet shown below has no URL links:

This is how it displays:

Code:

---

// Les Stokes @TheEconomist #TheBigRethink conference, Hot News - the way LA researches, thinks window.open(this.href); return false;">#NewThinking

// 'New Horizons'...LA feature in #NewDesign issue 95 Yearbook. Looking back at 30yrs in business window.open(this.href); return false;">http://t.co/UUKpMU3e

---

They should have displayed like this:

Code:

---

// Les Stokes @TheEconomist #TheBigRethink conference, Hot News - the way LA researches, thinks & interacts with consumers is now #NewThinking

// 'New Horizons'...LA feature in #NewDesign issue 95 Yearbook. Looking back at 30yrs in business & looking on to the next http://t.co/UUKpMU3e

---

Does anyone know why it's displaying like this? All other earlier tweets look fine.
Thanks