I noticed in my Google+ account that the album that contains the photos posted on this blog, was on private.
I do not remember doing that! So I made it public and VOILA, everything is back where it should be. :)
I can't be sure of course, but I think Google has done something to correct the problem of 'being out of
upload space', because I did not get the notice that I have 'no more download space' when I posted this photo.
And, now I have the situation of two photographic blogs, as if it's not difficult enough to run one lol.