This is relatively a minor one.
Set OO options so that the mouse pointer is placed on the default button on any
dialog window you open (this setting can be VERY useful to speed up many
standard formatting operations, so I have adopted it since a long time).
Now open a calc document, and click on the tool button to create a chart (with
the new 2.3 module). 
If you choose any chart type different from the first one (i.e. dispersion), the
selection is ignored, the first one is still the selected one and the pointer is
moved on the "end" button. 
If you want to choose a different chart type, you have to click on it again for
a second time. This time things work as expected.