Lookup switch is a bytecode representation of your switch statements.
BTW, I noticed that there is no server VM in the 1.6 snapshot. Is there going to be one?
I just did a performance comparison of JEmu2 with MAME, and found that one game runs about 18% slower than MAME on the 1.6 client VM while it runs as fast as MAME using the 1.4.2 server VM. I’d be really interested to soo how a 1.6 server VM would compare here 
Are you sure you have downloaded jdk, not jre ? Also, be sure to copy it by hand from jdk bin directory to jre bin directory after installation.
Oh yes, you’re right it was only the jre :-[
I didn’t want to do a real install (last time I did that, JWS and browser integration got messed up), so I downloaded the self-extracting JAR.