This release adds a number of new checks to Burp Scanner, to report the following issues:
File upload functionality
Robots.txt
SSL certificate problems
SQL syntax in request parameters
Silverlight crossdomain policy
Disclosure of social security numbers
Disclosure of credit card numbers
Disclosure of database connection strings
Disclosure of server-side source code
ASP.NET tracing enabled
ASP.NET debugging enabled
HTTP PUT enabled
It must be said that many of these aren't the most exciting issues you can find in web applications, but they are all checks that people have been asking for. And even seemingly banal issues can often lead to bigger things so are worth investigating.