Failed to upgrade v5.0rc11 on RB600A + RB616 to v5.0 and v5.1.
Netinstall v5.0 and v5.1 not working with this RB600A + RB616.
When I tried to reinstall v5.0 or v5.1 with netinstall-5.0rc11 even simple configuration with bridges crash the system:

MikroTik 5.1
new-router Login: skb_over_panic: text:89f56a14 len:160 put:160 head:86d43200 data:86d43240 tail:0x86d432e0 end:0x86d43240 dev:<NULL>
Oops: Exception in kernel mode, sig: 5 [#1]
RB333/RB600
last sysfs file: /sys/bus/spi/uevent
NIP: 801ca214 LR: 801ca214 CTR: 8016da60
REGS: 87ffde70 TRAP: 0700 Tainted: P (2.6.35)
MSR: 00029032 <EE,ME,CE,IR,DR> CR: 24000024 XER: 20000000
TASK = 803003c0[0] 'swapper' THREAD: 8031a000
GPR00: 801ca214 87ffdf20 803003c0 0000007a 00003895 ffffffff 8016e5a0 00000000
GPR08: 80324dfc 80300000 00003820 0000000a 44000082 10019a74 89f5afbc 80300000
GPR16: 86e9c300 86e9c30c 00000040 86e9c4c0 80300000 00000000 00000000 000003ff
GPR24: 00000001 0000003f 86f588c0 86f8c000 86e9c000 86e9c300 0000012c 86e9c30c
NIP [801ca214] skb_put+0x78/0x88
LR [801ca214] skb_put+0x78/0x88
Call Trace:
[87ffdf20] [801ca214] skb_put+0x78/0x88 (unreliable)
[87ffdf30] [89f56a14] 0x89f56a14
[87ffdf80] [801d30c8] net_rx_action+0xbc/0x174
[87ffdfb0] [800396bc] __do_softirq+0xc0/0x144
[87ffdff0] [80010db4] call_do_softirq+0x14/0x24
[8031be70] [800059ac] do_softirq+0x78/0x84
[8031be90] [80039808] irq_exit+0x60/0x70
[8031bea0] [8000585c] do_IRQ+0xd0/0x13c
[8031bed0] [80011a84] ret_from_except+0x0/0x14
--- Exception: 501 at cpu_idle+0x8c/0xe4
LR = cpu_idle+0x8c/0xe4
[8031bf90] [8000948c] cpu_idle+0xe0/0xe4 (unreliable)
[8031bfb0] [80003e2c] rest_init+0x64/0x78
[8031bfc0] [802dd744] start_kernel+0x2bc/0x2d0
[8031bff0] [00003438] 0x3438
Instruction dump:
7c0803a6 4e800020 80030014 80e300b8 2f800000 810300bc 419e001c 7c8802a6
3c60802c 90010008 38639924 48080d2d <0fe00000> 3d60802c 380b9068 4bffffe0
Kernel panic - not syncing: Fatal exception in interrupt

panicSaver: dumping panic to flash
flash: erase 1c
flash: prg 1c
flash: prg err 0
Rebooting in 1 seconds..

So the question is RB600A not supported now or it's just a bug?

how often does it crash? can you try to make a supout.rif file? we can't repeat it, we have many RB600A's running on v5.1 but a supout.rif file would help to find your problem.

it should stop crashing if you unplug all ethernet cables. then connect with serial console and make the supout.rif file.

It crashes and then reboot immediately after system boots up. Yes, I've noticed that system not crashing if some port are unplugged, but sometimes it lockes up CPU load at 100% after a while. Unfortunately I can't change that router just for making some testing and generating suppout right now. May be I'll try to make it on this weekend. Anyway my RB600A can't even be installed with netinstall-5.0 or 5.1 because it does not seeing any ethernet port after booting via bootp as I see from the console.