well....there good be a variety of benign reasons.
Someone developing a website with SMF may want to see others and get ideas, or ....
yeah ..probably some exploit: there have been some just recently patched with 1.1.1 that allow uploaders to enter Javascript cloaked as an image ( gif) which could then lead your browser to...
http://blogs.zdnet.com/security/?p=15There is also a LONG OUTSTANDING code exposure issue with SMF as well, that allows anybody to see the source code of recently patched SMF files. (This is dangerous if, like some people, you actually hard code sensitive information INSIDE a php file, ie.