From the description of this bug, it looks like a wishlist / optimization, marking it so, and targetting for v6 (makes more sense right now - v5 only receives bugfixes)
If this is not the case, please explain what the bug is (as far as I can see if I attempt to create an invoice on a date where there is no currency conversion rate it correctly warns about it, so that must not be it).
From the description of this bug, it looks like a wishlist / optimization, marking it so, and targetting for v6 (makes more sense right now - v5 only receives bugfixes)
If this is not the case, please explain what the bug is (as far as I can see if I attempt to create an invoice on a date where there is no currency conversion rate it correctly warns about it, so that must not be it).