Hi, I recently replaced my original HDD that came with the MBP with a 120Go SSD. I put the SSD where the system disk rests and bought an Optibay-like caddy to keep the HDD in the Superdrive emplacement, like many people do. After doing so, I started having Wi-Fi problems. Sometimes, the connection would just stop working while still be shown as "activated". The only way to get the connection back was to reboot the Mac. This particular problem happened more and more frequently, to the point of the impossibility to use Internet for more than 10mn. Also, when clicking the "Shut down" option from the Apple menu, the Mac would instantly reboot instead of staying off. Putting it to sleep by closing the lid of via the Apple menu was also impossible. I re-opened my Mac and reinstalled the Superdrive in its original emplacement and everything seems to work fine. But I would really like having the HDD on-board since it holds my entire iTunes + iPhoto libraries and I never use the Superdrive anyway. So, what could possibly cause these problems ?