• corrects an over-brightness issue affecting the MSX, CPC, ColecoVision, 2600 and Vic-20 that on some machines made some colours indistinguishable;
• ensures that 'double' Apple IIe modes (80-column text, double high resolution and double low resolution) no longer output four pixels of old data on the right edge of the display;
• corrects MSX pasting behaviour — previously only short strings would work;
• eliminates potential near-pixel-boundary output errors on the Electron; and
• ensures that window resizing can't leave a stray column of pixels on the left.