Icons of Windows application appear repeatably on my dock

[AsafD]

Hi,

I use Parallels Desktop 5 in full screen mode.

I noticed that when I go back to OS X, the icons of the applications I used under Windows appear repeatably on my OS X dock.

I am attaching an image of my dock.

When I right click on those icons the "force quit" option is available.

Any suggestions?

Thanks!