Some console errors

Hi,

this is my first experience in this community. I have a MacBook Pro 13" (middle 2010, 2,4 GHz Intel Core 2 Duo, 4GB) with SL 10.6.8.

Immediately after the start (about 40 seconds, maybe a bit slow), I'have no issues but the console messages are:

29/06/11 13.29.10 com.apple.launchd[1] *** launchd[1] has started up. ***

29/06/11 13.29.38 com.apple.WindowServer[69] Wed Jun 29 13:29:38 MacBook-Pro-di-Marco.local WindowServer[69] <Error>: kCGErrorFailure: Set a breakpoint @ CGErrorBreakpoint() to catch errors as they are logged.

29/06/11 13.29.43 com.apple.launchctl.Aqua[100] launchctl: Please convert the following to launchd: /etc/mach_init_per_user.d/com.adobe.SwitchBoard.monitor.plist

29/06/11 13.29.43 com.apple.launchd.peruser.501[98] (com.apple.ReportCrash) Falling back to default Mach exception handler. Could not find: com.apple.ReportCrash.Self

29/06/11 13.29.40 com.apple.launchd.peruser.501[98] (com.valvesoftware.steamclean[127]) posix_spawn("/Users/Marco/Library/Application Support/Steam/SteamApps/steamclean", ...): No such file or directory

29/06/11 13.29.40 com.apple.launchd.peruser.501[98] (com.plexapp.mediaserver[128]) posix_spawn("/Users/Marco/Library/Application Support/Plex/Plex Media Server.app/Contents/MacOS/Plex Media Server", ...): No such file or directory

29/06/11 13.29.40 com.apple.launchd.peruser.501[98] (com.valvesoftware.steamclean[127]) Exited with exit code: 1

29/06/11 13.29.40 com.apple.launchd.peruser.501[98] (com.plexapp.mediaserver[128]) Exited with exit code: 1

29/06/11 13.29.41 com.apple.launchd.peruser.501[98] (com.apple.Kerberos.renew.plist[121]) Exited with exit code: 1

29/06/11 13.29.46 com.apple.launchd.peruser.501[98] (com.apple.CSConfigDotMacCert-desantism@me.com-SharedServices[131]) Exited with exit code: 1

29/06/11 13.29.47 com.apple.launchd.peruser.501[98] (0x100103680.mach_init.switchboard.sh) Failed to check-in!

Is everything normal? How can I do to get rid of these messages?

Thanks