unique arrays

[khaine]

I am having problems with the unique_array function. It keeps dropping items that are unique but not repeated. i.e.

var[1]="1"
var[2]="2"
var[3]="2"
var[4]="3"
var[5]="3"

returns

var[1]=" "
var[2]="2"
var[3]=" "
var[4]="3"
var[5]=" "

Anyone got any ideas as to why??
Or what I can do to fix this..