If I receive a single payment from a client covering several invoices, and apply that payment from the Customer Details page, the confirmation email that gets sent out only references one of the invoices (via the %InvoiceNumber% placeholder).

Really where the single payment is applied to multiple invoices the %InvoiceNumber% placeholder needs to return the list of all relevant invoices, otherwise the email is confusing.

I hope that this can be fixed soon!

Mark