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I have a Windows system with a trackpad which is configured for horizontal and vertical scrolling. In most applications this works fine (web browsers, etc) but in Meld, horizontal scroll does not move the diff views.

I figure, either this is a Meld-specific issue (possibly related to how the scroll event is hooked to sync the horizontal offset between the panes) or it's a problem with the UI widget set being used (GTK+?) that needs to be addressed upstream. I don't have a Linux system with built-in horizontal scroll handy so I don't have an easy way to determine if this is definitely a Windows-only issue.

Windows 3.16.2 binaries from meldmerge.org, if that matters.