Hey MR, so I just installed a 320GB Samsung 5400RPM into my MacBook, check sig for details. Replaced the OEM 160GB. Well I used first SuperDuper! and it booted up fine, but I found it to be really laggy, specifically my dock is in hide mode and it would like lock up or something for a sec before showing. Same thing with the dashboard. I have it hot cornered and it will take a few seconds before popping up, even F12 won't work for a while. So I redid the backup process using Carbon Copy Cloner and that seemed to copy over at a better 1:1 since the sizes were the same this time. Well the OS still seems to lag at times, not as bad, but there are still at times (often) for 2-3 seconds I can't access dashboard or the dock and then it's fine and snappy. Also other quirks I'm noticing is when in either Firefox or Safari, when I click within the window, it seems to click outside the window to gray out the window bar and does not register clicks very well. Annoying. When I put my original 160GB back in, everything is snappy and great, which is quite annoying b/c I don't want to go back to the size but I might b/c of these lag issues and quirks. Do I just need to give the new HDD time? I've went into expose/spaces to reset my preferences and restarted the machine, but ugh. Thanks for your time!