I know this doesnt help much but I saw in one of the release notes in the 8.4.7 code train a performace issue with ssp 60 fix.  It was an issue with too many connections or something and then degraded performance.  Possibly fixed other issues.

I have this problem too.  Here is all I have found. https://supportforums.cisco.com/discussion/11063516/asa5510-ldap-authentication-across-w2k3-ad-domains https://supportforums.cisco.com/discussion/11216346/ldap-question- solution 2 above works if al...