Hi Paolo,
I think you are right, I’ve accidentally damaged PHP serialized strings in the DB. I’ve managed to fix it manually for now, but I’ll try to use the tool you suggested the next time I attempt the migration.
Anyway, changing the URL values of ‘geodir_post_types’ in wp_options caused the map to crash (path to favicon.ico). The other changes just caused some minor issues, like icons not displaying.
Thanks.