We choose "Print Chart" in the Chart view. A popup opens and the chart appears as an pnp file in a popup window. We copied out the location of the pnp through properties window, it e.g. says:

http://our.server:8080/jira/charts?filename=jfreechart-onetime-1881258128115079115.png

Copiing this to a browser window results in an error like:

Cause: 
javax.servlet.ServletException: File 'C:\Program Files\Apache Software Foundation\Tomcat 6.0\temp\jfreechart-onetime-1881258128115079115.png' does not exist 

It seems that the pnp is temorary saved in Tomcats temp folder, we looked at the server and saw the filename appear for a second in the temp directory, but than it disappears!
A Tomcat issue or what could we do? Appears in Jira 3.13.5 & Jira 4.0.1 Test on Greenhopper 3.8 & 4.2.

Thanks a lot!