Still no solution for this issue? 75% of my visitors on my page has either has an iphone or ipad. I would like to have this to work. There must be solution to this somewhere.
This http://www.parorrey.com/blog/php-development/resolve-mobile-safari-greyed-out-file-field-issue-in-iphone-ipod-ipad-by-using-picup-app-to-upload-images/
did not work either.
Can someone please help?

Hi!

I have the same problem... 

What I have found out this is a major problem due to Iphone use MobileSafari and everywhere I have been searching, at the Joomla-forum and elsewhere, this is something with the js-file.
I found this on another page but I'm not a expert in this type of codes...
http://www.parorrey.com/blog/php-development/resolve-mobile-safari-greyed-out-file-field-issue-in-iphone-ipod-ipad-by-using-picup-app-to-upload-images/
Could this be the solution? Is there anyone that has tried this?