There must be something in your code that is doing this, but you didn't show us that part. What you showed us should work fine:

while(<DATA>){
    @array = split '/';
    print $array[0];
}
__DATA__
C:\Documents and Settings\Claire\Desktop\ /LOG:fgf /L /XF doc /W:3 /R:
+10 /COPY:dtao /FP
[download]

This gives me "C:\Documents and Settings\Claire\Desktop\".