After creating new file of 1600 x 1200 dimensions,setting zoom level to 100% blocks usually the right side of the canvas with transparency grid.Scrolling right and scrolling back shows grid blocks of random sizes and/or in random locations.zoom levels above and below 100% do not show this.Brush strokes made a 100% zoom are appear to erase, revealing more of the grid.Painting on grid erases grid. 1)Lower zoom level to 100%. The transparency grid is displayed over right side of the canvas,blocking any content underneath. Build 2017-10-11 on Windows 7 At 100% the entire canvas should be visible.
*** This bug has been marked as a duplicate of bug 385734 ***