Hello all,

I am getting spontaneous crashes time to time, with applications unexpectedly quitting one by one eventually resulting in total freeze of the system. It happens some time (usually hours) after system has been started. Today it crashed when the following applications where running:
Transmission
Firefox
Mail

These messages appear in logs:

10/2/10 6:28:03 PM mDNSResponder[20] mDNSPlatformRawTime went backwards by 2 ticks; setting correction factor to 3332901547
10/2/10 6:28:03 PM mDNSResponder[20] mDNSPlatformRawTime: last_mach_absolute_time 27C0809807F57AED
10/2/10 6:28:03 PM mDNSResponder[20] mDNSPlatformRawTime: this_mach_absolute_time 27A6131300000000
10/2/10 6:28:03 PM mDNSResponder[20] mDNSPlatformRawTime went backwards by 1 ticks; setting correction factor to 3332901548
10/2/10 6:28:19 PM com.apple.launchd.peruser.501[2139] ([0x0-0x2e02e].org.mozilla.firefox[3034]) Exited with exit code: 3
10/2/10 6:28:29 PM ReportCrash[3054] Failed to create CSSymbolicatorRef for fontd
10/2/10 6:28:29 PM com.apple.launchd.peruser.501[2139] (com.apple.fontd[2149]) Job appears to have crashed: Floating point exception
10/2/10 6:28:29 PM ReportCrash[3054] Saved crash report for fontd[2149] version ??? (???) to /Users/mrx/Library/Logs/DiagnosticReports/fontd_2010-10-02-182829_MrXs-Mac-Pro.crash
10/2/10 6:29:23 PM ReportCrash[3054] Failed to create CSSymbolicatorRef for Transmission
10/2/10 6:29:23 PM ReportCrash[3054] Saved crash report for Transmission[2916] version 2.04 (11151) to /Users/mrx/Library/Logs/DiagnosticReports/Transmission_2010-10-02-182923_MrXs-Mac-Pro.crash
10/2/10 6:29:23 PM com.apple.launchd.peruser.501[2139] ([0x0-0x20020].org.m0k.transmission[2916]) Job appears to have crashed: Floating point exception

Has anyone experienced similar behavior? Any suggestions what could be done to fix this?

My system:
MacOS SL 10.6.4 (Retail modified), kernel AnV 10.4.0v4 Chameleon V2.0RC4, PC_EFI v10.6
Mobo: Asus A8N-SLI
CPU: AMD Athlon64 X2 3800+
Video: Geforce 7900GT PCIe 256MB (vanilla kexts + GraphicsEnabler boot option)
LAN: onboard (nForceLAN 0.64.5 kext)

Thanks in advance!
FX