I use the XT version and I have the same problem. But only with Chrome Browser.
This is very strange because when I refresh the page, 5 or 6 times, my FusionCharts's graph appears, and, after, if I refresh a seventh time, it disappears.
If I use debug mod (F12) I can see this message :
Uncaught RuntimeException: #25081850 myChartID::RendererManager Error >> There was an error rendering the chart. Enable FusionCharts JS debugMode for more information. FusionCharts.js:56
a.renderer.notifyRenderFusionCharts.js:56
embedSWFFusionCharts.js:96
a.renderer.register.renderFusionCharts.js:110
a.renderer.renderFusionCharts.js:57
a.extend.renderFusionCharts.js:64
a.extend.renderFusionCharts.js:66
lFusionCharts.jqueryplugin.js:11
c.fn.insertFusionChartsFusionCharts.jqueryplugin.js:13
(anonymous function)jquery-script-perso.js:505
e.extend.eachjquery-1.7.2.min.js:2
e.fn.e.eachjquery-1.7.2.min.js:2
(anonymous function)jquery-script-perso.js:499
ojquery-1.7.2.min.js:2
p.fireWithjquery-1.7.2.min.js:2
e.extend.readyjquery-1.7.2.min.js:2
c.addEventListener.B