the transparent background become a black ground in wine

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i have download the thunder p2p download tool,http://down.sandai.net/thunder7/Thunder7.2.7.3496.exe ,it 's homepage : http://xunlei.com/

i have successfully install thunder7.2.7, but i got a headache,there are 2-3 black blocks one the screen, also i right click the mouse,the right menu has a black background too. i guess that is a transparent issue in wine 1.4.

anyidea for this issue?