SLF4JLocationAwareLog serialization exception

While attempting to make a large object graph serializable I kept encountering NotSerializableExceptions regarding my Log references which were instances of SLF4JLocationAwareLog. The references were declared transient so I beat my head on a wall for a few hours before upgrading my slf4j version from 1.4.2 to 1.5.8

Somewhat frustratingly - that resolved the issue. No idea why.