Superfish dropdown menu no longer stretches to include full item text

I recently upgraded my site from Pixture_Reloaded 7.x-1.0 to Pixture_Reloaded 7.x-2.2. After the upgrade the superfish dropdown menus no longer displayed the items correctly.

I attach screenshots of before and after. Before you will notice that the dropdown menus stretched to include the whole length of the test in the link. After the upgrade the dropdowns seem to be of fixed width and if the text is larger than the width allowed they obscure the text below when you hover over them.

The Literature Review & Bibliographies item is a good example.

Using Firebug I notice in the older version the html for the element is:

<a class="sf-depth-2 " title="Literature Review & Bibliographies" href="/edenext/?q=content/literature-review-bibliographies" style="float: none; width: auto;">Literature Review &amp; Bibliographies</a>

Whereas the new is:

<a class="sf-depth-2 " title="Literature Review & Bibliographies" href="/?q=content/literature-review-bibliographies">Literature Review &amp; Bibliographies</a>

I am not sure if the missing style definition is the problem or not, if it is where do I add this code for the new version. If it isn't what is the solution.

Many thanks in advance.