64-bit JVM (both sparcv9 and x64) can't recognize '+UnlockExperimentalVMOptions' when running in 32-bit mode.

Hostname: jtg-x4200-01.sfbay

# ./java -XX:+UnlockExperimentalVMOptions -version
VM option '+UnlockExperimentalVMOptions'
Unrecognized VM option '+UnlockExperimentalVMOptions'
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.

# ./java -d64 -XX:+UnlockExperimentalVMOptions -version
VM option '+UnlockExperimentalVMOptions'
java version "1.7.0-ea-fastdebug"
Java(TM) SE Runtime Environment (build 1.7.0-ea-fastdebug-b32)
Java HotSpot(TM) 64-Bit Server VM (build 14.0-b03-2008-08-27-230752.ysr.hs-merge-fastdebug, mixed mode)