It is always the Nokia matcher. I have taken a look at our IIS log to match up the entries there with our application log. Here are some of the requests: 2012-01-18 00:32:39 10.101.5.102 GET /courts/practicedirections/display.aspx url=http://www.copapedrodevaldivia.cl/webalizer/produtos/a.txt? 80 - ...

I am occasionally seeing the following error in my web site's error log: System.Web.HttpUnhandledException (0x80004005): Exception of type 'System.Web.HttpUnhandledException' was thrown. ---> System.NullReferenceException: Object reference not set to an instance of an object. at WURFL.Matchers.Nokia...