Questions/Issues like this goes in this forum:
http://www.codeproject.com/Forums/1645/Site-Bugs-Suggestions.aspx
:)
For now, bookmarking an article can be done:
Just towards left of voting bar at the top, you have a star-with-plus. Hover over it, and it will read as 'Add to your codeproject bookmarks'. click it, and you are done! :thumbsup: