I'm using the 1.6 version with the lastest Highcharts js library (currently v.3.0.6) with no major problems - the only one I found is with persistent charts (see this link for more info).
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On GWT Highcharts download page at http://www.moxiegroup.com/moxieapps/gwt-highcharts/download.jsp
it points to 1.5 version
while I looked at sourceforge download page at https://sourceforge.net/projects/gwt-highcharts/files/ it is having latest version 1.6
So can you help me to decide whether 1.6 version is stable ?
I'm using the 1.6 version with the lastest Highcharts js library (currently v.3.0.6) with no major problems - the only one I found is with persistent charts (see this link for more info).