I suppose the forum administrator would be the webmaster.
From https://www.arduino.cc/en/Main/ContactUs:
For any feedback or reporting an issue with the website please email webmaster (at) arduino.cc
for future reference, since I think this problem has already been resolved.
lemming:
The "Attach" section of a new post should not just have the, "Allowed file types: doc, gif, jpg, mpg, pdf, png, txt, zip, c, h, cpp, ino, pde. Restrictions: maximum total size 1 MB, maximum individual size 1 MB", but should also add that no files can have Exif data embedded. It had me stumped as most would be.
I think that's a good suggestion. I know this problem has come up in the past and people have spent a bunch of time trying to embed images unsuccessfully. The best place to report the suggestion is here: