invisible widgets

I have a relatively new MBP, and I have not had many problems so far with it. However, today, when I went to my dashboard, all but 2 of the widgets have mysteriously disappeared. When I went to edit my dashboard, there were x's by all the widgets that are now invisible. so I removed them all and tryed to put them back into the dashboard. Each time I did this, the widget would show up, only to disappear into the abyss. I recently downloaded 10.4.6 and boot camp. Is it possible that messed it up? If not what did?????