Hi guys,
I have a similar problem. My Macbook Pro is from Mid 2009 and is 13". I have two of those pixel vertical columns. I went to Apple store and they told me I have to replace the whole LCD. Don't you guys think this is a defect in some of the Mid 2009 series of 13" Macbook Pro? Did you guys ever drop your laptop by accident? That never happened to me but Apple told me that must be the reason!
Moreover, had you seen a shiny spot at the bottom of the screen? I have seen it in some of the Macbook Pros!
Thanks.