IDEA 4.5.3 and JRE > 1.4.2_04

Is anyone using IDEA 4.5.3 with a jre other than the one thats bundled?

I tried using 1.4.2_07, 1.5.1_01 after adding the -Didea.no.check.jdk=true option to the JVM_ARGS but with no luck.