I can confirm that this also happens with 4.2.7.Final and is fixed in 4.2.8+
Since versions 4.2.8+ use a different version of javassist and are therefore not usable with e.g. WebSphere anymore, I beg you to release a 4.2.7.SP2 that includes that fix!
I also added another test case that might be worth including into the testsuite.