CLONE -On Mac OS X Snow Leopard, extra click required for stacked widgets

I have some widgets which act as rows in a container widget I call selector. Each selector uses a Vbox and adds the row widgets. I am doing some qgradients and mouse handling on the row widgets and sending signals to parent selector. In my main widget I have n number of selectors stacked using QStackedLayout. On the mac as I double click to drill down the stack and then single click a row, the first click seems to be wasted. After that the clicks work fine. It also works as on linux and windows if I am in the debugger. I am wondering if this is expected mac behavior? I do notice with other applications I have to do some addition clicks compared to linux and windows.