FYI - Upgraded to 3.3.3.2.3.2201. System reboots every few minutes.

Telnet log:
> sys ver dbg
Router Model: Vigor2820 Series Version: 3.3.3_232201 English
Profile version: 3.0.0 Status: 1 (0x49c73056)
Router IP: 192.168.1.1 Netmask: 255.255.255.0
Firmware Build Date/Time: Oct 23 2009 15:23:15
Revision: 16717 V333
ADSL Firmware Version: 232201_A Annex A

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fimrware exception debug info

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EPC=80029938, Cause=80000028, Status=1000fc03, BadAddr=000000d3
exception id=10(RI: Reserved Instruction)
exception occured in TASK level, task_id=161, SP=0x80856978(11524 bytes free, 0
used bytes)
system tick =23276
CURRENT_VERSION : 3.3.3_RC5
get from address : 80004000

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I have reverted back to 3.3.2.1 until further notice.

Simon.

Make sure you send the trace to support !