Uber made a post about this the other day, and I have to admit it is strange...

Most Mac users are aware that when browsing this site with Safari, posting images anywhere is out of the question. You get a smarmy "Use Firefox instead" message if (heaven forbid) you try.

Now... the strange part of all this is that Safari users are NOT universally blocked. Windows users of Safari 3 are off the hook, and free to upload images. But if you use Safari on a Mac... you're out of luck(oh, the irony =| ). Well, out of luck unless you're willing to do a little command-line work once & switch your user agent every time you upload a pic.

If the debug menu trick doesn't seem like your cup of tea, then consider: If newgrounds changed a single line of code...*cough*line 25 in http://js.ngfiles.com/fileupload.js *cough*

from;
if((useragent.indexOf("safari") != -1) && (useragent.indexOf("mac") != -1))
to;
if(useragent.indexOf("applewebkit/5") != -1)

Sometimes I see stuff like this, and I have to comment. If for no other reason than reason itself. Safari 3 is a reality, based off of WebKit 5, which either is, or will soon be the dominant version of Safari, since it is available to most modern Macintoshes.

Plus, it's one less operation to load up in javascript, y'know?