he means there is already another thread that shows this and all u have to do is
[Only registered and activated users can see links. Click Here To Register...] <- click
and besides, ppl have been saying that it is impossible to show +1 items since they become +1 when u pick it up.
and if u still get confused by what i just said (OMG) the theory means that all items that are dropped are normal, but when u pick them up there is a small chance that they become +1, so u cannot find out if they are +1 or not until u pick them up.