Sagan Technology has updated Metro to v6.4.7.1.

Fixed in this version:

• Cutting twice in succession in the sections window was not working properly.
• The default port (set from the edit port dialog of the tracks window) was not being restored properly in some cases.
• In some cases MIDI ports would disappear.
• Multiple (MIDI) files can now be opened upon startup by dragging them to the Metro Icon in the finder or dock.
• Keyboard repeats generated by holding keys down were being ignored.
• 32 bit integer .AIF files were not being written correctly in certain cases.