java version: 6u10 b10 (beta)
tested bundles:
jre-6u10-beta-linux-x64.bin
jre-6u10-beta-linux-x64-rpm.bin
jdk-6u10-beta-linux-x64.bin

trying to run Font2Dtest demo fails. Output is attached as error_output.txt and the error log is at hs_err_pid3533.log.

trying to run SwingSet2 demo throws an exception. Output is attached at error_output_swingset.txt

I tried to run some other jar files, created in 1.6.0 b105, they failed with silimar output as the Font2Dtest demo.

Tested on german and english locales on RHEL 5 x64.
Im sorry for confusion, it happens in 6u10 b14 beta, not b10.