Some files didn't get uploaded

[eluser]mDonchev[/eluser]
Hello Guys,

We have a very strange problem. Few days ago we moved our CI application (PM software) to a new VPS server on a different hosting service.
And on that server some files didn't get uploaded at all.
For example some PDFs can be uploaded with no problem and 1 our of 10 cannot.
By "cannot be uploaded" I mean that the $_FILES array is empty.

You can see the old server's PHPINFO here:
http://picklegroup.com/phpinfo.php

And the new VPS's PHPINFO here:
http://spot.am/phpinfo.php

Can you please tell us where to look for the problem. We are sure its not a CI issue, but I'm just looking for some help.

Thanks
Martin

[eluser]pickupman[/eluser]
Maybe a bit of a hail mary, but I noticed that upload_tmp_dir was not set in php.ini. I know it defaults to the systems default when empty, but what if you set it. Make sure that you have the proper permissions. The upload should be independent of CI, certainly a strange behavior.