Hi everyone!

I have a query re: filter rules in a Smartcache (which I believe may apply to other filtering solutions too)


In an RM article I have noticed the above as an example to filter the image section of alloftheweb.com

My question is..... what is that colon doing there!!! I can't seem to find any reference to a colon in the address of the site so I am thinking it has some sort of wildcard function?! Or am I completely wrong (Highly likely!)