RT @http://groups.google.com/group/linux.debian.bugs.dist/browse_thread/thread/233eb5085eeeede0

~$ eclipse
searching for compatible vm... 
testing /usr/lib/jvm/java-6-openjdk...found 
/usr/lib/jvm/java-6-openjdk/bin/java: symbol lookup error: 
/home/s230984/.eclipse/org.eclipse.platform_3.2.0/configuration/org.eclipse.osgi/bundles/81/1/.cp/libswt-mozilla-gtk-3236.so: 
undefined symbol: _ZN4nsID5ParseEPKc 

installing xulrunner-dev seems to fix this.