Hi domurtag, 
  
Since you are using v3.2.4 you can use FusionCharts.setCurrentRenderer('javascript'); , before rendering your chart. This would help in resolving the issue. 
  
If still the problem persists, I would suggest you to download the latest version from the link below: 
http://www.fusioncharts.com/download/ 
  
JavaScript charts long label management when compared to Flash charts are being handled without wrapping/adding ellipses. Please find the screenshot attached. 
  
Thanks