Icon-receiver taking up 4.3 Gigs in dom0?

top shows that icon-receiver is taking up 4.3 Gigs in dom0 “VSIZE is 7.3G, and RSIZE is 4.3G”. Given the filesize of icons, this seems excessive to me. Is this expected behavior?

(This is on a system that is still on 4.2 and has been running continuously for 183 days)

If it’s just a slow memory leak, is it possible to restart icon-reciever without horking the running system?