From: Matt Seitz (matseitz) <matseitz@cisco.com>
Date: Wed, 22 Feb 2012 22:13:23 GMT
Subject: gitk: set uicolor SystemButtonFace error on X11 if .gitk created using Win32 tk
Message-ID: <70952A932255A2489522275A628B97C31288FA0B@xmb-sjc-233.amer.cisco.com>

Would you please change gitk to not hard-code Win32-specific color
values when creating .gitk on a Win32 windowing system?

Gitk stopped working for me on Cygwin when Cygwin changed from using a
Win32 native version of tk to using the standard X11 version.  The error
was because gitk had previously created a .gitk file using Win32
specific color values:

https://github.com/gitster/git/commit/1924d1bc0dc99cd3460d3551671908cc76
c09d3b

I was able to work around the problem by replacing the Win32 specific
colors in my .gitk file with the default colors gitk uses on other
windowing systems.
 
See also:

http://cygwin.com/ml/cygwin/2012-02/msg00391.html