Book collision on LibraryThing

I resumed using LibraryThing recently and added several books more (you might notice books selected from my online library in the sidebar). Among them, the entry for Iwanami Mathematics Dictionary (yes, it's in Japanese) on LT got weird.

The entry got mixed (or combined, as a post in LT group forum told) with some strange manga book which I am never aware of. The post said it was caused by hash collision... what a poor implementation!