Redmine

Wt-3.9.1 on Linux (Ubuntu/x86 platform).
I'm trying to use the WButtonGroup code from one of the examples here. checkedChanged() signal routes to my callback function, but I pass checkedButton() as an argument and it always shows I've got button 0 checked. Am I looking at the wrong thing in order to process radio button clicks? I can see that the button changes instantaneously to the one I've clicked, but it immediately goes back to the original setting.

Sorry for stupid questions... Thanks for any help.