When making some changes to a client's SharePoint 2003 site I came across a page that had a content editor webpart, which had a JavaScript re-direct in it. This caused me all sorts of problems as I wanted to stop the re-direct as the client now wanted to use this page instead of taking the users else where. I knew that I could use the webpart maintenance page but for the life of me I couldn't remember how to access. After some investigation I found out that if you type in the URL of the page and add in ?contents=1 then this takes you to the maintenance page and from there I was able to close my problematic webpart.

This works on both SharePoint 2003 and MOSS 2007 so from now on if you need to get access to the webpart maintenance page you can use this technique