wine users - May 2012 - the transparent background become a black ground in wine

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?