Angstrom v2012.12 package index out of sync

Looks like the package index is out of sync with the package
repository and none of the packages identified for upgrade can be
downloaded. This is an excerpt from messages produced by "opkg
update;opkg upgrade":

Upgrading kernel-module-tcp-lp on root from 3.8.13-r23a.7 to 3.8.13-r23a.8...
wget: server returned error: HTTP/1.1 404 Not Found

May I ask for updating?