if_le unit number change?

I use vmware to run freebsd.

recent update of 8-current changed the unit number of the virtual
network interface, an emulated if_le. usually the unit number should
start from 0 ,namely le0. But after updating the source, le0 becomes
le1. This makes interface name mismatching that in rc.conf. I checked
the commit log but there seems nothing related in sys/dev/le. So
should this be caused by something else?

The kernels dated 11/5 & 11/26.

Jia-Shiun.