Meta search profile biasing - In a meta (federated) search each profile can be given a weight for additional control over the output to favor certain backend profiles.
Canonical URL support - The crawler will now respect link rel="canonical" headers to index the canonical form of the URL.
HTTPS/SSL Cipher support - More flexibility in specifying supported ciphers to let you balance security and older browser support.
Reject Rules always honored - Reject rules will now always be honored, so pages will be removed from the index on a refresh if they rules now exclude them, and robots.txt rules that block the base URL will still be kept.
Faceted search counts - Faceted search counts improved when estimated due to large number of results.