QT Jambi Appliaction chrash with "double free" from glibc

[Daniel Sigg]

My QT Jambi Application with custom widgets (written in Java) crash with:
"*** glibc detected *** ../jre/bin/java: double free or corruption
(fasttop): 0x08a38bb8"

JRE: 1.6.0_04
Jambi: qtjambi-linux32-gpl-4.3.3_01 (compiled download)
Linux: kubuntu with libc 2.6.1

No more Information, no Stack-Trace or error logs from the jvm are
available :-(

Thanks for any hint...

Daniel