Regarding huge images on the forum

[Mave]

Large images break the forum.
We all know this frustrating problem..
A good example is https://forums.themavesite.com/index.php?topic=5469

A not-so-smart solution is resizing to width=1000, but if you go smaller than 1000, the forum still gets stretched out.

Now there is a perfect solution out there to fix images from 'breaking the forum', but it doesn't work on this theme.. which is really making me lose my mind.
It resizes the images posted to whatever the browser width size is.
An example:

http://50.87.144.13/~themaves/test/index.php?topic=1.0
Check the wallpaper I posted, now resize your screen to make it smaller, how awesome is that?

Now there's not much I can do, I tried comparing both css files, but still didn't see the problem.
Gonna try asking a css master like Rafay to maybe take a look in it, because this would be the best solution to fix posted images.

 

[ThePro]

Can you send me both the css files? I might be able to find out

 

[Mave]

Can you send me both the css files? I might be able to find out

Current theme https://forums.themavesite.com/Themes/oldblack/css/index.css
Working test theme http://themavesite.com/test/Themes/default/css/index.css

EDIT: I have "fixed" it. I left out the 'max-height: 640px', because often I post pictures with an insane height (like 2000pixels)
With that line of css code back, it works.
So now we have working resized images but I can't post pictures with a big height.
Example: https://forums.themavesite.com/index.php?topic=22240.msg167443#msg167443 (resized too small to read)

EDIT2: If I increase the max-height to 1000px, it still fucks up :/