The bug in 6333055 also exists in BufferStrategyPaintManager.dispose:

    protected void dispose() {
        // dipose can be invoked at any random time. To avoid
        // threading dependancies we do the actual diposing via an
        // invokeLater.
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                java.util.List<BufferInfo> bufferInfos;
                synchronized(BufferStrategyPaintManager.this) {
                    while (showing) {
                        try {
                            wait();
                        } catch (InterruptedException ie) {
                        }
                    }
                    bufferInfos = BufferStrategyPaintManager.this.bufferInfos;
                    BufferStrategyPaintManager.this.bufferInfos = null;
                }
                dispose(bufferInfos);
            }
        });
    }

we synchronize on the BufferStrategyPaintManager enclosing instance but then invoke wait() instead of BufferStrategyPaintManager.this.wait(). This will cause IllegalMonitorStateException to be thrown.