SmartGit, SmartSVN and SmartSynchronize show a black area right beside the last column in the header area.
It is following bug in SWT
bugs.eclipse.org/bugs/show_bug.cgi?id=474096
and we don’t know of a work-around for now. We would like to encourage you to vote for this bug at bugs.eclipse.org, so it will get the necessary priority.
Update Aug-18-2015 Though the SWT team has fixed it, Microsoft also released a fix for Windows 10 which solved this problem.