The displays Dell uses are maufactured by LG Phillips, a Korean company which is currently trying to create the largest lcd panels available. I wonder if Phillips will appreciate the bad vibes created by Dell refusing to take responsibility (http://www.lgphilips-lcd.com/). I am attempting to get a response from Phillips about whether or not they have already (or are planning) to correct the defect, and if so how one can tell from the part number or batch number or whatever (I operate a repair shop and would hate to replace a customer's display with one that will likely fail).
The LG Phillips part number on the display in my Inspiron 9300 is LP171WX2 B4. These displays can be purchased on ebay for about $225 (though one schmuck is trying to sell a display that has already developed vertical lines for $79 - I guess he thinks its a good deal because it has so few lines...).
Online Dell service manuals have instructions for removing and dissaembling laptop displays. It is a faily simple process to replace the lcd panel (many could do it themselves and any competent local computer shop should be able to do the job in well under an hour).
If Dell cared about their customers they would at least make replacement lcd panels available at cost (probably $100 or less) since so many are failing so soon after warranty. Instead Dell priced a replacement lcd panel for my Inspiron 9300 at $500 whether I do the work myself or send it in, about the cost of a comparable new laptop. Not a good way to treat long term customers...