basic question: gwcheck does report "problems" and "errors". Are
"problems" just cosmetic problems (e.g. orphan files which are not in
use anymore) or do they also show serious problems like data loss?
Documentation only says that I don't have to worry about "problems",
because they are fixed by gwcheck (whatever that means!).

To be specific: "Problem 43- User attachment record xxxxx not found".
Does that mean that there is an *active* email for which the attachment
file does not exists anymore, or is it an obsolete attachment? How can I
find out which email is the one with the problem, so that I can look at
it in the user's client?

Thanks in advance