Solution
If you one of the unlucky in admin/upload.php you should add 2 times after line:
Code
...
move_uploaded_file($tmp_name,'../'.$path.$file_name);
...
Code
chmod ( '../'.$path.$file_name, 0666);
Code
...
$copy = move_uploaded_file($tmp_name,'../'.$path.$file_name);
chmod ( '../'.$path.$file_name, 0666);
...
and
...
$copy = @move_uploaded_file($tmp_name,'../'.$path.$file_name);
chmod ( '../'.$path.$file_name, 0666);
...
I think we will release some improvement soon, meanwhile if you encouter this issue here's how to fix it.