Reproduced with 0.48.4 and current trunk r12832 if the mouse focus is on-canvas and not in the 'Undo History' dialog.
(I didn't reproduce because I used the keyboard shortcuts only, which doesn't move the focus out of the (by default docked) Undo History dialog).
Reproduced with 0.48.4 and current trunk r12832 if the mouse focus is on-canvas and not in the 'Undo History' dialog.
(I didn't reproduce because I used the keyboard shortcuts only, which doesn't move the focus out of the (by default docked) Undo History dialog).