I have 478 photos on flickr. All of them are public, none of them have tags. A typical day will get as many as 10-12 views, certain photos are popular enough to start waves of viewings so I have had days of 50 or 60 views, but that's still unusual.
On April 15th I had 956 views. Almost every photo was viewed twice, except for two viewed three times and one viewed five times. Doing the math shows a handful weren't viewed at all that day.
After that day, it was back to normal until April 22nd. From the 22nd through the 27th I have had between 463 and 475 views per day. Today's sweep hasn't started yet. I am in the process of converting all of my photos to friends only for awhile to see what happens to the numbers.
Is this happening to anyone else?