title: Selenium WebDriver issue with By.cssSelector
body: <p>I have an element whose html is like : </p>
  
  <pre><code>&lt;div class="gwt-Label textNoStyle textNoWrap titlePanelGrayDiagonal-Text"&gt;Announcements&lt;/div&gt; 
  </code></pre>
  
  <p>I want to check the presence of this element. So I am doing something like :</p>
  
  <pre><code>WebDriver driver = new FirefoxDriver(profile);
  driver.findElement(By.cssSelector(".titlePanelGrayDiagonal-Text"));
  </code></pre>
  
  <p>But its not able to evaluate the CSSSelector. </p>
  
  <p>Even I tried like : </p>
  
  <pre><code>By.cssSelector("gwt-Label.textNoStyle.textNoWrap.titlePanelGrayDiagonal-Text")
  </code></pre>
  
  <p>tried with this as well :</p>
  
  <pre><code>By.cssSelector("div.textNoWrap.titlePanelGrayDiagonal-Text")
  </code></pre>
  
  <p>Note : titlePanelGrayDiagonal-Text class is used by only this element in the whole page. So its unique. 
  Contains pseudo selector I can not use. 
  I want to identify only with css class. </p>
  
  <p>Versions: Selenium 2.9 WebDriver
  Firefox 5.0 </p>