I just got a MBP with Lion on it. I'm new to Macs, so I don't know much about how stable they are. I think I've heard they're supposed to be a lot more stable than Windows. I was just doing some browsing in Safari, when Safari froze the whole system. I could still move the mouse pointer, but nothing else worked. I couldn't click on anything, I tried the Command-Option-Escape but that didn't do anything (is that supposed to be equivalent to Ctrl-Alt-Del in Windows?). I finally had to hold down the power button for several seconds to turn it off. Now it's back on again and seems to be working fine. Just wondering if this sort of thing ever happens on a Mac? Or do Macs never crash like this and I should be worried about a possible hardware problem? Also, since I had to force the Mac to power off by holding down the power button, I'm wondering if I should try to make sure that nothing on the hard drive got corrupted? Does the Mac have an equivalent to the Windows "chkdsk" command?