On our sharepoint intranet site we had a problem with a webpart. This webpart displayed some top sites. Whenever we wanted to remove it we received a javascript error.

Someone suggested us to add ?contents=1 behind the url (resulting in something like: http://<your domain here>/Pages/Default.aspx ?contents=1)

you will now see the hidden webparts page, and can delete the irritating Web Part

Use with caution!