lazman opened the ticket and wrote:

screen blanks & then comes back at lower resolution intermittently, in full-screen mode.

The above happens at all resolutions above the default, it doesn't always come back at a lower resolution, sometimes it will come back at the same resolution.

The only way to get back to my preferred resolution is to go into settings & deselect full screen/select full screen, in 10 minutes of game time I had to do this at least 10 times.

It seems to happen mainly when I click on a task button (build road/track/station/etc) & when the screen comes back I have to re-select the action that I wanted to take before the screen blanked.

It was so annoying, I de-installed the game. I won't re-install it until a patch comes out.

Open TTC 1.6.1 (newest version) (before & after I downloaded & installed an AI)
Windows 7 Home Premium (x64) Service Pack 1 (build 7601)
3.60 gigahertz AMD FX -4100 Quad-Core
Board: ASUSTeK Computer INC. M5A78L LE Rev X.0x
8176 Megabytes Usable Installed Memory
NVIDIA GeForce 9800 GT [Display adapter]
CVT 1080A [Monitor] (July 2006)

Reported version: Version?
Operating system: All

This issue was imported from FlySpray: https://bugs.openttd.org/task/6541