[#4376] - Svg image partially rendered in pdf created on linux

Hello,
I'm using JasperRports Server 5.6.0 in two installations, one on Windows7 (development machine) and the other on a linux server (CentOS 6.3) without X server. I creted a report with an image element with the followinng expression:

net.sf.jasperreports.renderers.BatikRenderer.getInstanceFromText($F{svg})

I use the rest_v2 interface with xml message format and I populate the datasource sending a bean (including the svg) in the report execution request (I wrote and deployed to JasperReport Server a custom datasource to extract the bean from the received parameters).

Everything is working fine when I use the installation on Windows, but when using the linux installation I always get a pdf containing an image with only few elements of the svg sent (e.g. if the svg has 3 lines, in the image only one is shown). I verified the sent svg is correct saving it as a file and displaying it in a browser and in Gimp, both of which show a "complete" image.

Any ideas about what is wrong?

Thanks in advance.