Comment 2 for bug 1015345

I can't seem to get a screenshot of this, because the border re-appears as soon as I press the Prt Sc key. Here are some more detailed steps:

1) Start drawing a line with the Paintbrush tool, and then (while drawing) move the mouse beyond the bottom right corner of the canvas.
2) The border shadow near the corner disappears.

You'll need to be running the latest development version of Pinta to see this, since the bug was introduced after the Pinta 1.3 release.