That also goes bad when you always use LogVolume00 (or whatever it is) as the LVM volume group name. I make the volume group name match the short part of the hostname (usually with something added for OS, so something like "kosh_f7_64".
I also always do this. My LVM volume group name is always $HOST-$RELEASE IMHO this is a far more sensible default than "LogVolume00". -benjamin