I've had a Kingston 128gb SSD in my optical drive bay and a 1 tb WD 5200 RPM drive in my standard HDD bay since I got my 15" MBP about 6 months ago. MOre and more I've noticed disk corruption issues especially when I've had to shut the computer down because it failed to do so on it's own. At first, I attributed this to a transferred disk image so I did a clean install of Lion. Still, I would get an issue where the MBP would do a chkdisk on the SSD on bootup. Last night, I was getting really strange behavior so I started up Disk Utility in the recovery partition and did a repair on the SSD. The repair failed an I was forced to recover from my Time Machine backup (which worked wonderfully). I love the SSD performance but now I'm thinking of simply putting the optical drive back in and simply using a Seagate hybrid drive or a 256gb SSD in the main HD bay. I really need reliability more than speed although the speed is awesome and my photo and video library has even outgrown the internal 1 tb data drive anyway. Anyone else have similar issues using an SSD in the optical bay?