Flickr is currently imposing limit on free accounts. The exact quote is shown below :
You’ve run into one of the limits of a free account. Your free account will only display the most recent 200 photos you’ve uploaded. All of your photos beyond 200 will remain hidden from view until you either delete newer photos, or upgrade to a Pro account.
With such limit, flickr become less user-friendly (at least to me ..), so, any alternative offers service in similar quality ? zooomr, bubbleshare ?