[libvirt] Libvirt storage api and lvm .cache issue

Hello all, I am using the libvirt storage api with LVM storage on rhel5 with xen and I noticed that when using the api to create/delete lv's they get added to /etc/lvm/cache/.cache but old deleted ones never get removed from the .cache. This causes dmeventd to keep trying to access them but can't which fills up the logs in /var/log. Has anyone seen this or have a fix for it? I guess I could force a vgscan or something to clean it up just seems like I shouldn't need to. Thanks, Tom