Graphics + artwork completely trashed! Help!

Getting this error in log:

[14-12-07 19:54:21.1055] Slim::Utils::DbCache::__ANON__ (268) Error: /var/lib/squeezeboxserver/cache/artwork.db
[14-12-07 19:54:21.1073] Slim::Web::Graphics::__ANON__ (393) Artwork resize for html/images/cover_96x96_p.png failed
[14-12-07 19:54:57.6550] Slim::Web::Graphics::__ANON__ (393) Artwork resize for html/images/Players/fab4_250x250_ffffff.png failed
[14-12-07 19:56:08.5122] Slim::Utils::DbCache::__ANON__ (267) Error: DBD::SQLite::st execute failed: database disk image is malformed
[14-12-07 19:56:08.5138] Slim::Utils::DbCache::__ANON__ (268) Error: /var/lib/squeezeboxserver/cache/artwork.db
[14-12-07 19:56:08.5155] Slim::Web::Graphics::__ANON__ (393) Artwork resize for html/images/cover_96x96_p.png failed

These are the last lines of many other messages

No images show in the LMS gui + missing artwork in listings on Touch

Help!