If you are using a recent KDE version, e.g. with openSuSE Leap 42.2, you will notice that some toolbar buttons don’t show a selected (or toggled) state.
You can fix (or work-around) it, by opening the System Settings and selecting “Application Style” in the “Appearance” section. On the tab “GNOME Application Style (GTK)” you can find the options for selecting GTK themes:
If you select, e.g. “Adwaita”, and click “Apply”, SmartGit’s toolbar buttons will show their selected (or toggled) state:
If SmartGit, SmartSVN or SmartSynchronize crashes for you on dialogs where (on other platforms) comboboxes are visible, please check whether the oxygen-gtk style is selected. It is reported to be extremely buggy and better should be replaced with either Adwaita or Clearlooks-Phenix:
- Open the System Settings
- Select the Application Appearance
- On the GTK+ Appearance page select, e.g. Adwaita
SWT bug report
Please also check out javaclipse.blogspot.de/2015/06/mars-on-linux.html for alternative hints.