Yeah, just to generate a progress percentage. It's just old code that wasn't updated, I think in 2012 there may have been more browsers that had flash installed versus supporting the HTML5 specific feature needed to generate a upload progress percentage. I actually didn't even think of updating it until it was mentioned last week- but there were other pressing issues at the time.

For the progress bar? That's the reason?

Not sure about other browsers, but Chrome gives you a percentage down the bottom (same as how it shows a URL when mousing over a link).

I will wait patiently for the fix, no problem.

thanks for your time, great work with the site.

Yup, it's on the to-do list to provide a fall-back or a new uploader in general- maybe I'll have a fix this week. It's used for the upload progress bar. You could temporarily install flash player for the moment.

Adobe Flash Player required to upload ? ..  really ?

Safari, Mac OSX 10.9 here.