pcache crashes after 2.4.25 upgrade; complains of unclean shutdowns and missing DB_CONFIGs after every restart

[Tyler Gates <tgates81@gmail.com>]

After upgrading from 2.4.24 to 2.4.25 my pcache overlay using hdb
backend first failed to start with messages complaining about a
missing suffix. Now that I've added one I'm getting the following
message:

 hdb_db_open: database "dc=example,dc=com": unclean shutdown detected;
attempting recovery.
 hdb_db_open: warning - no DB_CONFIG file found in directory
/var/lib/ldap: (14).#012Expect poor performance for suffix
"dc=example,dc=com".
slapd starting
bdb(dc=example,dc=com): PANIC: fatal region error detected; run recovery
last message repeated 3 times

But DB_CONFIG does exist and has proper permissions and the unclean
shutdown message repeats after every restart. I've never had to add
the suffix to the pcache backend database before and the documentation
examples (http://www.openldap.org/doc/admin24/proxycache.html) never
mention it either.
Is this a misconfiguration or do I need to file a bug?

PCACHE OVERLAY:

dn: olcOverlay={0}pcache
objectClass: olcOverlayConfig
objectClass: olcPcacheConfig
olcOverlay: {0}pcache
olcPcache: hdb 100000 3 1000 100
olcPcacheAttrset: 0 uid userPassword uidNumber gidNumber cn homeDirectory logi
 nShell gecos description memberUid uniqueMember objectClass
olcPcacheAttrset: 1 cn automountInformation
olcPcacheAttrset: 2 cn mail
olcPcacheTemplate: "(|(cn=)(mail=)(sn=))" 2 7200 0 0 0
olcPcacheTemplate: "(&(objectClass=)(|(cn=)(cn=)(cn=)))" 1 3600 600 0 0
olcPcacheTemplate: "(&(objectClass=)(|(cn=)(cn=)))" 1 3600 600 0 0
olcPcacheTemplate: "(&(objectClass=)(|(cn=)(gidNumber=)))" 1 3600 600 0 0
olcPcacheTemplate: "(&(objectClass=)(gidNumber=))" 0 1800 0 0 0
olcPcacheTemplate: "(&(objectClass=)(uidNumber=))" 0 1800 0 0 0
olcPcacheTemplate: "(&(objectClass=)(uniqueMember=))" 0 1800 900 0 0
olcPcacheTemplate: "(&(objectClass=)(memberUid=))" 0 1800 900 0 0
olcPcacheTemplate: "(objectClass=)" 0 1800 0 0 0
olcPcacheTemplate: "(&(objectClass=))" 0 1800 0 0 0
olcPcacheTemplate: "(&(objectClass=)(cn=))" 0 1800 0 0 0
olcPcacheTemplate: "(&(objectClass=)(uid=))" 0 1800 0 0 0
olcPcacheTemplate: "(&(objectClass=)(|(memberUid=)(uniqueMember=)))" 0 1800 0
 0 0
olcPcachePosition: tail
olcPcacheMaxQueries: 10000
olcPcachePersist: FALSE
olcPcacheValidate: FALSE
olcPcacheOffline: FALSE

HDB backend:

dn: olcDatabase={0}hdb
objectClass: olcHdbConfig
objectClass: olcPcacheDatabase
olcDatabase: {0}hdb
olcDbDirectory: /var/lib/ldap
olcDbCacheSize: 1000
olcDbNoSync: FALSE
olcDbDirtyRead: FALSE
olcDbIDLcacheSize: 3000
olcDbLinearIndex: FALSE
olcDbMode: 0600
olcDbSearchStack: 16
olcDbShmKey: 0
olcDbCacheFree: 1
olcDbDNcacheSize: 0
createTimestamp: 20110225174535Z
olcDbConfig: {0}set_cachesize 0 10485760 1
olcDbConfig: {1}set_lg_regionmax 262144
olcDbConfig: {2}set_lg_bsize 2097152
olcDbConfig: {3}set_flags DB_LOG_AUTOREMOVE
olcDbConfig: {4}set_lg_max 10485760
olcDbIndex: objectClass eq
olcDbIndex: cn eq,subinitial
olcDbIndex: uid eq,subinitial
olcDbIndex: uidNumber eq
olcDbIndex: gidNumber eq
olcDbIndex: userPassword eq
olcDbIndex: description eq
olcDbIndex: loginShell eq
olcDbIndex: homeDirectory eq
olcDbIndex: memberUid eq
olcDbIndex: gecos eq
olcDbIndex: automountInformation eq
olcDbIndex: uniqueMember eq
olcDbIndex: mail eq,subinitial
olcDbIndex: sn eq,subinitial
olcDbIndex: givenName eq,subinitial
olcDbIndex: member eq
olcDbIndex: nisMapName eq
olcDbIndex: pcacheQueryID eq
olcSuffix: dc=example,dc=com