When I'm viewing this forum on my iPad in landscape mode (1024px width), it loads the mobile version of the site. So everything looks huge!
Is it possible to change the breakpoint so it only loads the mobile view on maybe devices which are smaller than 768px perhaps?
You could always switch to full version manually.
Still, if the forum is automatically selecting "mobile", then it should test screen min-max for "mobile". Displaying an un-viewable page is a bug. After such a test, it should then choose "mobile-small" or "mobile-large" for proper a display on a mobile device.
If that can't be done, then there should be a button for user selection of "small or large" (or "mobile" or "fullsize"), anytime while at the site (because mobile needs that simplicity).
"The gods want their entertainment. The gods of Greece are
cruel! In time all men shall learn to live without them."
Why do you think it should check screen resolution? There are phones with resolution over 1080p, they shouldn't be getting the desktop version of the site. Detection is based on the user agent of the browser.
You can switch by just clicking "go to the full version" at the bottom of the site, this setting should be remembered