On the preferences pages, I seem to remember that the previous version had 
fields where the user was asked to select the minimum and maximum number of 
days work to keep on disk, and it would seek more work units when the cache 
got below that level.

Those parameters seem to be gone now, or at least I couldn't find them. 
Anyway, I am wondering now:

a.  How does Boinc decide that you're ready to receive more work units?

b.  How does it allocate between climatepredicition workunits, which can 
take up to a year to process, versus seti work units, that can be finished 
in less than a day?

- db