rem: mainThread->getChangeList()->applyToCurrent();
add: mainThread->getChangeList()->applyAndClear();
context: void syncThreadProc (void *OSG_CHECK_ARG(arg)) {                   while(doRun)    {        syncBarrier->enter( syncCount );        mainThread->getChangeList()->applyToCurrent();        syncBarrier->enter( syncCount );    }}