I've done some investigation and this looks like it's a glibc issue.  You can
use bits of the standalone java VM that mozilla uses and those standalone parts
don't work on the 7.1 beta.

You can get a copy of the standard jdk code at:

http://people.redhat.com/blizzard/java2.tar.bz2

If you untar it you should be able to cd into the bin/ directory and run ./java
-version and it should print out a version string.  It works on 7.0, anyway.

This is a buggy JDK (it has hardcoded knowledge about thread stacks being 2MB
in size aligned to that size). We're now discussing what do with that.

Particularly at least os::Linux::install_alternate_signal_stack(void)
contains this bug.

Opening up so that the sun people can look at this bug.

Should be fixed in glibc-2.2.2-7 and Sun is actually working on a fix using
pthread_getattr_np.