Dell have the unfortunate task of recalling around a million notebook and/or docking station power adapters.  There is -- apparently -- a small risk of fire.  I'd hate to be the company who built those for them. What's awesome is that that couldn't make the job of ordering (for free) replacement adapters any easier than they have.  Simply visit http://www.delladapterprogram.com/, fill out the form and they'll send you new adapters.  http://www.engadget.com/entry/0265152283883584/ 
http://money.cnn.com/2004/10/08/technology/personaltech/dell_recall/index.htm?cnn=yes