on flickr, there are two exposures... which is weird. At least for me. http://flickr.com/photos/kinetic/3307912453/meta/
The first one shows seconds, the second one shows 0.00 with no units. I feel like it has something to do with your light meter.
The Exposure 30 makes me think it's not your shutter speed? What is your flickr page?
On second thought, I just checked one of my super slow shots too, and it shows Exposure: 14 with no units. ODD!
http://flickr.com/photos/kinetic/3209187560/meta/in/set-72157594189182622
Well, maybe you were at 30 seconds, and the water is just too uniform to actually look flowy. Try to post your flickr page, I'm curious now =)