I actually have the use L$ box checked and a 0 balance on my purchased K$ and everytime I buy in the cattery I get told it will use menagerie dollars. It never does, it always processes the sale using my inworld L$ balance as its supposed to. This has occured ever since they added the option to use L$ to pay so I guess its either a bug or someone neglected to update the system not to give out that message when the L$ box is checked.