Back to the problems!
Started Strawberry just now and my 'A' collection is now back down to 15 entries and my artists who are numbers (ie 10cc, 10000 Maniacs etc) have disappeared all together.
I've checked again the tags on some of the missing artists and searched Strawberry but they aren't being found at all.
Annoyingly they were all there last night!
Not sure where I go from here.