Have you ever had trouble with sharing photos using Flickr ?

Recently I uploaded some photos and created a set , I created a Guest pass for the recipient to click on to look at and if they wish to download the photos.

What happens is they received the link and the thumbnails but when they click on the link they are asked to logon , I thought they can just look at the photos without having to create an account with Flickr.

I was able to send links in the past for people to see the photos I have snapped and they did not have to do anything except to click on the link I downloaded.

Either way I just wanted to know if you experienced any problems using Flickr.

Thanks