Display issues related to Mac OS version

I have a late 2009 Mac Mini connected to a Samsung LN40B630 (40in HDTV) using a mini DVI to HDMI connector. When I first hooked up the system last Jam everything worked perfectly. Then sometime 4-6 months later, the display no longer fit the screen no matter what I tried (settings and various different connectors). Recently, reading in the chat boards, there was an indication that the OS version and (I suspect) resulting display driver updates might be the issue. I did an erase and install which corrected the issue and now the display fits and looks perfect. I've allowed all the software updates to bring the system current except for the OS update. I'm still running 10.6.2. I'm wondering if anyone has experienced the same or similar issue. Also, does anyone know if there is an improved display driver update? For now, I'm not going to allow the OS update however, I don't see this as a long term solution.
thanks

Hi - I tried changing settings on both the Samswung TV and the Mac Mini. My TV has a setting called "screen fit" which should do the trick but for some reason has no effect on the Mac Mini signal. I've tried "overscan" on and off as well. The only thing that has worked is to reload the starter OS disk that came with the machine using the erase and install function or hooking up with my wife's Macbook Pro also works fine. I'm still guessing the OS update is what makes the Mac mini output not fit the scree. I've backed up the recent reload to Time Machine and will try the OS update to confirm this is what breaks it. Any other ideas ?

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Model Name:          Mac Pro
Model Identifier:          MacPro3,1
Processor Name:          Quad-Core Intel Xeon
Processor Speed:          3 GHz
Number Of Processors:          2
Total Number Of Cores:          8
L2 Cache (per processor):          12 MB
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Serial Number (system):          CK******XYL
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Type:          Display
Bus:          PCIe
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PCIe Lane Width:          x16
VRAM (Total):          1024 MB
Vendor:          ATI (0x1002)
Device ID:          0x68b8
Revision ID:          0x0000
ROM Revision:          113-C0160C-155
EFI Driver Version:          01.00.436
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Core Image:          Software
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Online:          Yes
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<Edited By Host>

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