This problem seems related to lack of updated video drivers. I would recommend updating to the latest graphics drivers; you can test your computer by loading our generic drivers off the link below:
Make sure to select your operating system version and try to install that driver when it finishes downloading, to verify that your system will accept it.
My processor is Intel Celeron B815. Driver's Readme file indicates that only 2nd generation Core, Pentium 2xxx, and Celeron 9xx processors are supported. Should I download it anyway?
I was looking here, but there are no available downloads:
EDIT: Problem solved by installing the latest drivers. Many thanks, now my 4:3 resolutions are displayed properly.
This is honestly the most annoying bug in the software. Any time you create a custom resolution at 4:3, you have NO OPTION to maintain aspect ratio. It's complete crap. The driver always decides to stretch full screen.
Please make this the #1 thing to fix. Make it so we can MAINTAIN ASPECT RATIO for custom resolutions.
I'm purposely bumping all aspect ratio questions so you programmers know how serious of an issue this is.
Also fix the limited 60hz problem for monitors that can go to 120hz. That's another huge bug.