I have uploaded mintty 3.0.6 with the following changes:
Terminal features
* Support for horizontal mouse scrolling (#925).
* Fixed sixel display which was broken in 3.0.3.
Font rendering
* Changed default value CharNarrowing from 70 to 80 (#922).
* Excluding arrows, technical symbols, and other ranges from
auto-narrowing (#922).
Virtual Tabs
* User-definable key bindings for quick tab switching (#923, #699).
Other
* Safe handling of missing shortcut title/appid (#920).
Configuration
* New user-definable functions switch[-visible]-(prev|next) (#923).
The homepage is at http://mintty.github.io/
It also links to the issue tracker.
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Thomas
