Issue with Lion OSX and Samsung HDTV

Hi everyone,
I have a problem while connecting my Samsung HDTV model LNT3242HX with my Mac ever since I upgraded to Lion (I was previously on Snow Leopard).
I'm using a Macbook 2.13 GHZ Intel Core 2 Duo (Mid 2009).
I use the Mini DVI to VGA cable and I hook it up with my TV. The thing is, with Lion, when I connect my TV, it doesn't fit the whole TV screen. There's about an inch to the left and the right where the screen stays dark. I did not have this problem with Snow Leopard.
When I check in my display preferences, my resolution is set to 1360x768 , however it says Usable Resolution 1280x768...And there's no way to change the refresh rate to anything else besides 60 hertz....
I don't really know if anyone can help? As it used to work just fine before, I assume there must be some kind of glitch between OSX Lion and my HDTV. I tried hooking it up to my other LG HDTV, and there is no problem, it's just with my Samsung TV.
Thanks in advance for anyone who can help me out!

I have the exact same problem except mine is a 52 inch tv and there is at least 6 inches on either side plus 3+ inches on teh top and bottom. Wasnt an issue with Snow Leopard. I read somewhere that I may need to buy a $100 adapter instead of using the DVI to VGI cable. Any assistance would be greatly appreciated as I use this setup when I telework and the screen resolution is too small to be useful now.

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