Something very strange happened to me: I try to explain.
I had several crushes two / three days ago: Aperture (last version, running on iMac with 10.8.2) was very unstable. But what I noticed, is that the program was “hysterically” synchronising my Flickr account. At the first moment, I could not understand what was happening. But I noticed that some files in my library had a very poor resolution and problems with reference.

Now, I saw that in my “Master” folder, there are hundreds and hundreds of jpg files coming from Flickr - I guess they are the result of that wird synchronisation.

QUESTIONS:
- Did anyone here experience a similar thing?
- What's the safest way to clean my Master folder from those files?
- Why it happened?
- Other tips / comments?