Pokemon Art Academy update out now in Europe and Japan

Pokemon Art Academy users in Europe and Japan can download a new patch from the 3DS eShop. It’s relatively minor all things considered, as the update is only intended to one particular issue.

As stated on an official Nintendo of Europe page:

Corrects the issue that when converting a picture made using only the Outline pen to JPEG format, in order to post it to Miiverse or save it to the SD card, the colours would not save correctly and would all be changed to black.

Source