The problem was LXDE. When running in IceWM the buttons work fine. See the bug report (http://bugs.winehq.org/show_bug.cgi?id=29025) for details. Thanks to everyone who helped.
The problem was LXDE. When running in IceWM the buttons work fine. See the bug report (http://bugs.winehq.org/show_bug.cgi?id=29025) for details. Thanks to everyone who helped.