'startup waiting' status message

A client was recently complaining about problems with not being able to
use a database during a vacuum. It wasn't completely clear what exactly
wasn't working, but what I'm really wondering about is the last status
message:

postgres 1857 0.6 0.8 20964 12900 ? D 15:03 0:00 postgres:
aspadmin test 192.168.100.7(34212) VACUUM
postgres 1861 0.0 0.2 19636 4240 ? S 15:03 0:00 postgres:
aspadmin test 192.168.100.7(34217) idle
postgres 1862 0.0 0.2 19636 4240 ? S 15:03 0:00 postgres:
aspadmin test 192.168.100.7(34218) idle
postgres 1863 0.0 0.2 19636 4240 ? S 15:03 0:00 postgres:
aspadmin test 192.168.100.7(34219) idle
postgres 2038 0.0 0.2 19628 3328 ? S 15:04 0:00 postgres:
aspadmin test 192.168.100.7(34223) startup waiting

I've grepped through the source code (grep -ri startup src|grep -i
waiting) and can't find this anywhere... anyone have any ideas where it
could be coming from?
--
Jim C. Nasby, Sr. Engineering Consultant jnasby(at)pervasive(dot)com
Pervasive Software http://pervasive.com work: 512-231-6117
vcard: http://jim.nasby.net/pervasive.vcf cell: 512-569-9461