If you use Mozilla’s Firefox as your browser then you may not be able to access Digimap’s Carto application. The reason for this is that Mozilla is now (from the 30th August 2012) automatically blocking Java. The reason that Mozilla has taken this stance is that a Java exploit has been added to the notorious Blackhole exploit toolkit. In simple terms, running Java applications through your browser opens your machine up to hackers, and we dont want that.
We are working on Carto’s successor which we hope to launch in 2013 and this will not rely on Java. If you need to use Carto, then it will still work in Internet Explorer and Chrome browsers. Hopefully Java will patch the breach soon and it will work again in Firefox.
For more information about this security issue please read this.