Webmaster Tools - Detected as Directory?

Hello, im exploring the webmaster tools because my blogpost takes 2-3 days before google indexed it..I checked the Crawler Access section and there's a button "Test", i think this will test the robots.txt, after clicking "Test", the result says;

"Allowed
Detected as a directory; specific files may have different restrictions"

Can someonce explain what's the meaning of this? Is this ok? my site is a blog that has few pages at several blogpost(Articles)....