If you are a Linux user which has problems with autohiding scrollbars that make it hard to select the last item in a table, tree or text control, you should try to set the environment variable GTK_OVERLAY_SCROLLING to 0 before launching the application. For SmartGit, open bin/smartgit.sh in a text editor and add the line
export GTK_OVERLAY_SCROLLING=0
before the last line.