Andrew said:

the rasberries normally that grow in my garden have always been, for
lack of a better phrase, perfect.. They have been soft to the touch when
picked and tasted as a rasberry should taste. For some reason for the
last week or so they have started to become crumbly. snip

Virus infections can cause crumbly fruit, but I've always noticed that
toward the end of the summer crop there is a tendency for the berries
to be small and break apart. I've put it down to poor pollination. As
the fresh flowers dwindle, the bees are less interested. If all the berries
on a particular plant are affected right from the beginning of the season,
you might be justified in worrying about virus infection.

Info on raspberry viruses:
http://ohioline.osu.edu/b861/b861_28.html
--
Pat in Plymouth MI ('someplace.net' is comcast)

Any technology distinguishable from magic is insufficiently advanced.
(attributed to Don Marti)