新版改进如下: r2280 - fix bug #2798680 (load & save message display interfere with gameplay)
r2281 gpu: blend 3d with whats beneath it in more cases. not entirely sure about the correctness of this, so keep eyes peeled for regressions in 3d/2d compositing
r2282 gpu: fix some probably inaccurate math in 3d blending against 3d. the effects of this are subtle, but see if you think it helps any