You'll see them when you relog in your inventory. Make a full file check with the updater.
For sure he will see them after relog when he can't even pick up

Magic
If he clicks the pick up button he actually picks them up. Happened to me before: I could not see the drops but other ppl in party could, I clicked pick up and my char moved to where the drop was but I could not see, all party saw I picked it up on system message, but I did not. I re logged and the drop was in my inventory as all party saw.
It's a client problem, not a server problem. So fixing the client should fix the problem. Sometimes simple logic seems like magic to the ones who cannot understand it

ye because everyone is clicking pick up button when there is nothing on the ground

and how will relog help if it's client problem

not even gonna mention that they told him to do update before and you have to repeat it to look so smart

Oh snap... just do search on forum and see other ppl had the same issue and that actually made them see the items... Relogging makes u see the items you picked up because you actually did pick them up. He cannot see most of the drops but some you see, so you click pick, also if u are in pt, other ppl can pick for you.
If you cannot add something useful and you only confuse ppl, don't post on this section please. This is not flame forum.