Wierder and wierder. I restarted it at about 4pm, left it unattended and on returning from work at 3am it's still up and downloading. Very odd.
Possible explanation is that it was something on one of the hosts which was causing my client to crash.
>> Later ........Now 22 hours uptime -- what's noticeable is that I seem to have more alive connections than with the older version. Oh joy! One of the things I've been downloading for the last 3 weeks is just about finished.