Plugin Admin console charset encoding issue

Hi everybody ,. I’m tryng to create a openfire plugin but i’ve got a problem. When i try to use special characters like “ñ” for a admin console’s page, instead of ñ appears ñ. i’m think that it’s a bug from the JSP precompiling script because i’ve used the metatag correctly. Also i’ve try with another charset encodings and always i’ve got the same problem. it’s simple to verify, just try to insert ñ in any plugin’s JSP file and run the Build.xml script with Ant.Then, install it and see the JSP file . How can i set the right charset?

i’m using openfire 3.7.1