Yes, I've noticed it too - recent photos I've uploaded are not showing and even I get a 'forbidden' message if I click on them. I have no idea why as they were loading fine earlier in the week. As this has been going on for several days I'm putting a query into Google/Blogger/Picasa. They are quite happily sitting viewable in the automatic Picasa album that anything I upload to the blog goes to (you can view it yourself here: THEWORLDFROMHERE04), just nowhere else.
Anyone else using Blogger having similar problems?
UPDATE: until this is resolved, excepting preloads like MTPY, I will use other photo hosting services, possibly Imagebam.
UPDATE 2: panic over! a third party - preusmably Picasa admin when they deleted an adult folder in there - had reset 2 of the 4 feeder albums so that only people with the link could view them, whereas they need to be set as public or they obviously won't display. I'm hoping that was accidental and I don't get any further comeback. If so, would seem rather that Blogger and Picasa rules conflict, which is crazy if that's how Blogger auto-archives your images.