Thanks for those replies - sorry I've taken so long to reply - but I'm now travelling on business in Germany.
Please report to Bug Tracker as it may be a problem with the base
Byte - I'll take your advice and post this as a bug and see what happens.
You could try selecting the older kernel at the boot screen
mercyh - Great I never thought of that! I'll try on my return tomorrow (As I said, I have downloaded another update hoping that might fix the problem - so I'll have to check if only 1 previous kernel is kept or if I can load even older ones)
I take your point about maybe not needing the updates - but as I'm relatively new to SME Server I thought it was a good idea to keep updated - also I plan to check out the email collection (with antivurus / antispam services), so the system is configured as a server / gateway already and the external interface does have a direct internet connection. (It seems to be ok - but its a very standard old 10M/bit/s ethernet card - probably based on Realtek 8029 chip)
Thanks for your response ...
Gavin