I attempted to reproduce this problem with the attached program AttemptReproDerby1966 against the reported version 10.3.1.4 on Windows with IBM 1.4.2 (although probably a later version of IBM 1.4.2)
$ java -version
java version "1.4.2"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2)
Classic VM (build 1.4.2, J2RE 1.4.2 IBM Windows 32 build cn142ifx-20110211 (SR13 FP8+PM31983) (JIT enabled: jitc))
Kristian also said he had trouble reproducing with the steps provided. I think unless someone has other ideas, we should close this one Cannot Reproduce