I can confirm that behavior for Xubuntu 8.04.3 LTS and Seahorse 2.22.2. After removing "ldap://keyserver.pgp.com" and leaving only "hkp://pgpkeys.pca.dfn.de" (German research network) it all worked out fine - even with user images.
I can confirm that behavior for Xubuntu 8.04.3 LTS and Seahorse 2.22.2. After removing "ldap:/ /keyserver. pgp.com" and leaving only "hkp:// pgpkeys. pca.dfn. de" (German research network) it all worked out fine - even with user images.