under a Hidden chart Module the parameter for adding a label to the X Axis doesnt seem to work:
I have also tried to use:
XAxisTitleFormatter but that didnt work either.
Splunk 4.2 use to add one automatically, why the change?
This is likely due to the change to JSChart instead of FlashChart. There's a range of charting properties that JSChart does not support. More info here: http://docs.splunk.com/Documentation/Splunk/4.3.1/Developer/AdvancedCharting
In that case it would be more appropriate for me to stick to a splunk version with flashchart instead of JSChart, until you SPlunk solve your current issues with JSChart.
FlashChart is still available in 4.3, but JSChart has become the default - add the code following to get your FlashChart (and all its supported options) back.