FBSD 7.1-STABLE: pkg_delete: segmentation fault

[O. Hartmann]

Hello Everybody,
Since several days ago I get a segmentation fault on a FreeBSD 
7.1-STABLE/AMD64 box when invoking 'pkg_delete' on installed packages to 
delete them. This box has been most recently 'built-world' and I did a 
'make delete-files' and sibblings as a precaution - but I still get this 
error.
I suspect a DB47 issue (if this is possoble, but I don't know). How can 
the database be repaired without loosing informations about the 
installed packages and is this shown degmentation-fault issue a well 
known issue?

Thanks in advance,
Oliver