Hi

If you try to create a chart with a title including ' like in "consommation d'alcool en France", you will be able to create it.
However, you will not be able to insert it in an article, javascript having an error.
Maybe a htmlentities() applied on the title could help this.
I haven't tested with other characters.

Using Joomla 1.5, JCE 1.5 fr, Free version of Fusion Charts for Joomla (v 1.0).

To see the bug, do as follow.
Create a graph, whatever the type is
Use a title containing the char '
insert whatever you want as content
save it
create a new article in joomla
click under the textarea the fusionchart button
it shows a popup with all the charts you've created
try to insert the new chart
Cancel when you have enough tried
go back to fusion chart
select the chart with the title containing '
delete the char ' and save
retry to insert the chart in the previous article
it works