Adding header image to lists is not working for me today

Is any one else experiencing this?

All I get is greyness where the image should be displayed.

I've tried logging out/in again etc and using different PCs but it still won't work. :(

1) header image is cropped and it covers only half of header. The other half of the header contains the title in black background. Are there any standard dimensions/proportions for the image?

www.listal.com/list/17th-tdf

2) another thing is color changing. The following list should have the romanian flag(blue-red-yellow) as image header

www.listal.com/list/romania

@gdeas

2) another thing is color changing. The following list should have the romanian flag(blue-red-yellow) as image header

www.listal.com/list/romania

Confirmed!
As a test, I added your Romanian flag pic as header to a list of mine and the color changed!

After several tests, I have the suspicion that color changes occur for.png image files

We only use .png images for headers, and have had no issues like this, so I'm not sure that that's the problem.

Another example
www.listal.com/list/movies-4-orangep
Original image:
upload.wikimedia.org/wikipedia/commons/0/06/Golden_Age_of_Hollywood.png

besides color changing, are there any suggested dimensions that header image should have? I have noticed that images are either cropped or strecthed(or both)

I've added the color change problem to confirmed bugs: www.listal.com/topic/image-collage-color-change

besides color changing, are there any suggested dimensions that header image should have? I have noticed that images are either cropped or strecthed(or both)

Any image must be tall enough to cover the header otherwise it will fill the rest in with black, currently the image headers are cropped at 1150x520, also some of the top of the image is hidden since it is revealed as you scroll down the page