Strange systat output on SMP FreeBSD 5.0-Current

[Killing]

                    /0   /10  /20  /30  /40  /50  /60  /70  /80  /90  /100
             <idle> XXXXXXXXXX  
root     idle: cpu1 XXXXXXXXXX  
root     idle: cpu2 XXXXXXXXXX  
root     idle: cpu3 XXXXXXXXXX  
root     idle: cpu0 XXXXXXXXXX

Looks rather strange to me is this right? Its a dual Xeon box which
has hyperthreading enabled so there should be 4 cpus  how come
there are 5 idle "processes" 1 for each cpu + <idle>?

    Steve