queue and archive processing(?) leave directories in /tmp

Somewhere in the processing of things, directories are being left on cocoplum in /tmp. This should not be.

These directories seem to have unpacked source code in them:

 ls -la xFYlJtGuvr/
total 28
drwx------ 3 lp_archive lp_archive 4096 2009-10-16 05:46 .
drwxrwxrwt 405 root root 20480 2010-08-13 14:52 ..
drwxr-xr-x 10 lp_archive lp_archive 4096 2009-09-23 22:25 udev-147~

 ls -la tmp9Lki8m/
total 40
drwx------ 3 lp_queue lp_queue 4096 2010-08-13 10:40 .
drwxrwxrwt 405 root root 20480 2010-08-13 14:52 ..
drwxr-xr-x 15 lp_queue lp_queue 4096 2010-08-13 10:40 d-conf-0.5
lrwxrwxrwx 1 lp_queue lp_queue 104 2010-08-13 10:40 d-conf_0.5-1ubuntu4.debian.tar.gz -> /srv/launchpad.net/ubuntu-queue/incoming/upload-20100813-103647-000147/d-conf_0.5-1ubuntu4.debian.tar.gz
lrwxrwxrwx 1 lp_queue lp_queue 94 2010-08-13 10:40 d-conf_0.5-1ubuntu4.dsc -> /srv/launchpad.net/ubuntu-queue/incoming/upload-20100813-103647-000147/d-conf_0.5-1ubuntu4.dsc
lrwxrwxrwx 1 lp_queue lp_queue 93 2010-08-13 10:40 d-conf_0.5.orig.tar.gz -> /srv/launchpad.net/ubuntu-queue/incoming/upload-20100813-103647-000147/d-conf_0.5.orig.tar.gz