Lcd has black streaks/lines when idle

My iPhone 3G sometimes has vertical black lines or streaks when it's idle (when nothing is being displayed on the screen). It's random, doesn't happen all the time, but is on there most of the time.
Using the phone and then letting it return to idle (blank screen) will clear the issue, but after some random time, it happens again, the streaks/lines come back.
they are very fine, and vertical. I wonder if this is reducing my battery life? as the phone is displaying black lines on it's display...
It's not causing any issues when using the phone, and is only when sitting idle on it's blank screen... v'strange. return this unit for another?

Hi. I recently updated to software vesion 2.0.2 and started to notice the vertical lines you describe. I had never noticed them before. I have spoken to Apple iPhone tech support and they say they have never heard of this issue. They have asked me to do a restore on the phone via iTunes to see if it is a software or hardware issue. If it still happens after restore they told me to go to Apple store to see about a possible replacement. I have tried the resore and so far I haven't noticed the lines but it is early days.
By the way I have noticed the lines appear randomly and sometimes when I receive an email and get the audible signal I can see them.
Let me know how you get on if you try to restore iPhone

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