http://bugs.winehq.org/show_bug.cgi?id=25514
--- Comment #4 from gabriel.ruffieux@bluewin.ch 2010-12-14 07:56:02 CST --- Ok, I identified the problem. In fact this bug happens when wine try to launch it's default browser when HTML file is clicked.
I changed my KDE configuration and associated html files with my usual browser instead of "A wine application".
Problem resoved for me but the bug exists anyway. Note that Wine shouldn't change file association order of my KDE!