cache_add_entry_lock failed

["Trapp, Michael" <michael.trapp@sap.com>]

hi,

i'm running openldap-2.0.6 on solaris-2.7 with berkeley-3.1.17
unfortunately i get the following error 

	====> cache_add_entry( 4348 ): "cn=...": already in id cache
	cache_add_entry_lock failed

the only regularity i can see, is that the id is always incremented.
there shouldn't be an error in the entries, because sometimes they are added
correctly in a following connection (dn, obj and attr unchanged).

any ideas ?

thanx 
michael