<div class="info">
  <div class="sidebar">
    <p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Ipsum, nemo, repellendus doloremque odio animi laboriosam libero omnis architecto adipisci, asperiores quibusdam. </p>
  </div>
  <h2 class="title">There is a problem here</h2>
</div>

<div class="info fixed">
  <div class="sidebar">
    <p>Lorem ipsum dolor sit amet consectetur adipisicing elit. Ipsum, nemo, repellendus doloremque odio animi laboriosam libero omnis architecto adipisci, asperiores quibusdam. </p>
  </div>
  <h2 class="title fixed">It's fixed!</h2>
</div>

.info {
  width: 80%;
  max-width: 600px;
  margin: 0 auto;
  border: 5px solid pink;
  clear: both;
}

.fixed {
  overflow: auto;
}

.title {
  background: lightgreen;
  padding: 1em 0;
}

.sidebar {
  float: left;
  width: 30%;
  margin-right: 2em;
}