Just letting you all know that 10.8.5 appears to disable the TRIM Enabler patch (or similar) that many of us use on our non-Apple SSDs. I have re-enabled with TRIM Enabler and everything is fine again.
To check (if you don't know) either use TRIM Enabler (it will be switched off) or check in System Info --> SATA/SATA Express and click on SSD and check TRIM Support.
To check (if you don't know) either use TRIM Enabler (it will be switched off) or check in System Info --> SATA/SATA Express and click on SSD and check TRIM Support.