For those interested, here's a copy of the email I sent them:
Hello, I have been thinking about purchasing the L90D+, and have read many good things about the monitor. However, upon doing some research, I discovered that monitors manufactured after June of 2005 seem to have a problem with vertical lines appearing in the right hand portion of the screen. I have read over 30 articles about this. I know you have an excellent warranty department and have replaced those monitors with refurbished monitors for those people. I have two issues with this. First: I do not want a refurbished monitor. If I did, I would buy one. Second: I don’t want to have to go through the hassle of returning a monitor and paying for shipping if/when this happens. Please let me know if the vertical line issue has been resolved. Your reply will make my decision regarding this product. Please reply ASAP, as I would like to purchase an LCD monitor shortly.