Why does my MAC sometimes crash when coming out of sleep mode?

My mac freezea sometimes when coming out of sleep mode, and occasionally the screen will go black. At other times I will be using the MAC and it will just freeze. The only way to get out of it is to kill power and reboot. It seems to be happening more frequently.
It was suggested that I fix permissions and start in sleep mode. This has helped in the past, and I am going to do it again now. I also recently upgraded to 10.6.8, and after that the crashes were fewer, but now they are increasing again.
I am including a log of the recent crash a few minutes ago.
12/23/11 11:41:02 AM com.apple.launchd[1] (com.apple.SystemStarter) Failed to count the number of files in "/System/Library/StartupItems": No such file or directory
12/23/11 11:41:02 AM com.apple.launchd[1] (com.apple.SystemStarter) Failed to count the number of files in "/System/Library/StartupItems": No such file or directory
12/23/11 11:41:02 AM com.apple.launchd[1] (com.apple.SystemStarter) Failed to count the number of files in "/System/Library/StartupItems": No such file or directory
12/23/11 11:41:03 AM com.apple.launchd[1] (com.apple.SystemStarter) Failed to count the number of files in "/System/Library/StartupItems": No such file or directory
12/23/11 11:41:03 AM com.apple.launchd[1] (com.apple.SystemStarter) Failed to count the number of files in "/System/Library/StartupItems": No such file or directory
12/23/11 11:41:03 AM com.apple.launchd[1] (com.apple.SystemStarter) Failed to count the number of files in "/System/Library/StartupItems": No such file or directory
12/23/11 11:41:03 AM com.apple.launchd[1] (com.apple.SystemStarter) Failed to count the number of files in "/System/Library/StartupItems": No such file or directory
12/23/11 11:41:04 AM com.apple.launchd[1] (com.apple.SystemStarter) Failed to count the number of files in "/System/Library/StartupItems": No such file or directory
12/23/11 11:41:04 AM com.apple.launchd[1] (com.apple.SystemStarter) Failed to count the number of files in "/System/Library/StartupItems": No such file or directory
12/23/11 11:41:15 AM com.apple.launchd.peruser.501[94] (com.apple.ReportCrash) Falling back to default Mach exception handler. Could not find: com.apple.ReportCrash.Self
12/23/11 11:41:23 AM com.apple.launchd.peruser.501[94] (com.apple.Kerberos.renew.plist[116]) Exited with exit code: 1
12/23/11 11:41:34 AM com.apple.WindowServer[71] Fri Dec 23 11:41:34 Macintosh.local WindowServer[71] <Error>: kCGErrorFailure: Set a breakpoint @ CGErrorBreakpoint() to catch errors as they are logged.
12/23/11 11:41:50 AM com.apple.launchd[1] (com.apple.SystemStarter) Failed to count the number of files in "/System/Library/StartupItems": No such file or directory
12/23/11 11:41:50 AM com.apple.launchd[1] (com.apple.SystemStarter) Failed to count the number of files in "/System/Library/StartupItems": No such file or directory
12/23/11 11:41:50 AM com.apple.launchd[1] (com.apple.SystemStarter) Failed to count the number of files in "/System/Library/StartupItems": No such file or directory
12/23/11 11:41:50 AM com.apple.launchd[1] (com.apple.SystemStarter) Failed to count the number of files in "/System/Library/StartupItems": No such file or directory

Okay thanks, but I am a newbie who is not a very tech kind of a person. The only periphals I have are a kodak camera dock, a Canon 310 copier/fax/scanner and a pair of altec speakers. How do I determine  if they all have drivers for my MAC? They all seem to work okay, if that is a sign, though the Kodak camera Dock is a bit slow. How also do I determine if they are Apple energy compatible? With each of these peripherals, do I simply disconnect them from my MAC one at a time to see if there improvement?

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    com.apple.iokit.IOFireWireIP
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