剛才看了他們的討論區
有人也有相同的症狀...
http://forum.maxthon.com/index.php?showtopic=36117
有人建議把plugin for ie 的 uncheck掉
還有go to Internet options > Advanced tab scroll down to the Browse section and clear the tickmark in the option 'Reuse windows for launch shortcuts' if it is checked that is
後者小有用吧...
至少現在memory usage只有12MB,virtual memory usage 約90MB(開15個tabs)

版本1.5.2(build21)