Is this missing an "overlay syncprov"? I don't know if that's instantiated automatically. Compare against one of the tests (test018 or so) configs.
"slaptest -d config" on the provider might complain about the syncprov-* lines. I'm partially surprised that it even starts.
On the provider it looks like :
database bdb suffix "dc=actia,dc=com" directory "/var/lib/ldap" index objectClass,entryCSN,entryUUID eq lastmod on
access to attrs=userPassword by dn="cn=admin,dc=actia,dc=com" write by dn="cn=syncuser,dc=actia,dc=com" read by anonymous auth by self write by * none
access to dn.base="" by * read
access to * by dn="cn=admin,dc=actia,dc=com" write by * read
syncprov-checkpoint 100 10 syncprov-sessionlog 100