Hi, I had a look on your pavatar.png and noticed that you do not autodiscover the right way.
If one has one domain and diffenrent people use it (mom, dad, Peter, Alex) and all do have their own directories: example.org/mom/, example.org/dad/, example.org/peter/, exmaple.org/alex/ and each have his/her own pavatar in the directory (example.org/peter/pavatar.png) your script cannot find them. It only searches exmaple.org/pavatar.png.