I don't like the hint window follows my cursor for it is annoying some time. So, I defined CTRL-0 as cm_ShowHints command and show the window as demand.
1. If I didn't turn on the config->display->win32 style tips... option, the hint window doesn't display at all.
2. If I turned it on, then move the cursor to somefile and press CTRL-0, another mouse point will appear.

I found the max number of duplicated mouse pointer is 5. I means when move the cursor to the 6th file and press CTRL-0, the first mouse pointer disappeared and new one is duplicated, so there are FIVE mouse pointers on the screen.
BTW: How can I display some picture such as the icon of it in the hint window?