Stage a few files, then hit Commit.
SourceTree hangs, and the blue progress bar stops moving.
Killing SourceTree and restarting shows the commit has suceeded.
This first started failing on 1.9.3-beta 1, but still fails the same way on 1.10.0-alpha-1
I have un-installed and re-installed, to no avail.
Changing Git versions: 2.8.3, 2.8.4, 2.9.0, Embedded git - makes no difference.
Rolling back to SourceTree 1.8.3 works fine.