Here are 2 samples of other machines running Mono 1.2.6 + Linux 2.6.22 SMP on AMD64 and they can't reproduce it either.
15:39:44 <nitram> Linux mandy 2.6.22-4-vserver-amd64 #1 SMP Tue Feb 12 11:02:59 UTC 2008 x86_64 GNU/Linux 15:41:13 <nitram> meebey: 1.2.6+dfsg-5~bpo40+1 mandy:~# cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 15 model name : Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz stepping : 11 cpu MHz : 2400.134 cache size : 4096 KB physical id : 0 siblings : 4 core id : 0 cpu cores : 4 fpu : yes fpu_exception : yes cpuid level : 10 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm constant_tsc pni monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr lahf_lm bogomips : 4803.75 clflush size : 64 cache_alignment : 64 address sizes : 36 bits physical, 48 bits virtual power management: processor : 1 vendor_id : GenuineIntel cpu family : 6 model : 15 model name : Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz stepping : 11 cpu MHz : 2400.134 cache size : 4096 KB physical id : 0 siblings : 4 core id : 1 cpu cores : 4 fpu : yes fpu_exception : yes cpuid level : 10 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm constant_tsc pni monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr lahf_lm bogomips : 4800.44 clflush size : 64 cache_alignment : 64 address sizes : 36 bits physical, 48 bits virtual power management: processor : 2 vendor_id : GenuineIntel cpu family : 6 model : 15 model name : Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz stepping : 11 cpu MHz : 2400.134 cache size : 4096 KB physical id : 0 siblings : 4 core id : 2 cpu cores : 4 fpu : yes fpu_exception : yes cpuid level : 10 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm constant_tsc pni monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr lahf_lm bogomips : 4800.46 clflush size : 64 cache_alignment : 64 address sizes : 36 bits physical, 48 bits virtual power management: processor : 3 vendor_id : GenuineIntel cpu family : 6 model : 15 model name : Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz stepping : 11 cpu MHz : 2400.134 cache size : 4096 KB physical id : 0 siblings : 4 core id : 3 cpu cores : 4 fpu : yes fpu_exception : yes cpuid level : 10 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm constant_tsc pni monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr lahf_lm bogomips : 4800.46 clflush size : 64 cache_alignment : 64 address sizes : 36 bits physical, 48 bits virtual power management: mandy:~# gacutil -l The following assemblies are installed into the GAC: I18N, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756 I18N.CJK, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756 I18N.MidEast, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756 I18N.Other, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756 I18N.Rare, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756 I18N.West, Version=1.0.5000.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756 Number of items = 6 ---------------------------------------------------------------------- 15:43:25 <tarzeau> meebey: i can't crash it ii mono-jit 1.2.6+dfsg-6 fast CLI JIT/AOT compiler for Mono Linux krum 2.6.24.1-amd64-1 #2 SMP PREEMPT Sun Feb 10 16:17:52 CET 2008 x86_64 GNU/Linux processor : 0 vendor_id : AuthenticAMD cpu family : 15 model : 67 model name : AMD Athlon(tm) 64 X2 Dual Core Processor 5400+ stepping : 3 cpu MHz : 2800.000 cache size : 512 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 2 fpu : yes fpu_exception : yes cpuid level : 1 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt rdtscp lm 3dnowext 3dnow rep_good pni cx16 lahf_lm cmp_legacy svm extapic cr8_legacy bogomips : 5603.20 TLB size : 1024 4K pages clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: ts fid vid ttp tm stc processor : 1 vendor_id : AuthenticAMD cpu family : 15 model : 67 model name : AMD Athlon(tm) 64 X2 Dual Core Processor 5400+ stepping : 3 cpu MHz : 2800.000 cache size : 512 KB physical id : 0 siblings : 2 core id : 1 cpu cores : 2 fpu : yes fpu_exception : yes cpuid level : 1 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt rdtscp lm 3dnowext 3dnow rep_good pni cx16 lahf_lm cmp_legacy svm extapic cr8_legacy bogomips : 5599.63 TLB size : 1024 4K pages clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: ts fid vid ttp tm stc -- Regards, Mirco 'meebey' Bauer PGP-Key ID: 0xEEF946C8 FOSS Developer [EMAIL PROTECTED] http://www.meebey.net/ PEAR 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