Odd behavior

[johngalt]

I'm using Firefox, Nightly builds on Windows and Gentoo Live DVD, latest Gentoo (portage) on 2 Gentoo installs on 2 laptops.

When I go into a forum, if there are more than one threads with new posts in therm, and I select any thread older than the newest thread to read / respond to, upon completing, that thread and the next thread with a newer response get marked as having been read.

My only recourse is to read the threads from newest response down, to avoid this happening.

Is this a known forum bug, or possibly just something on my own profile(s)?

I can test further if need be - I have a Macrium Reflect backup of Window s10 I can throw back on my SSD on my Desktop and test in Chrome, Edge, IE, Chrome Canary, Vivaldi, and all 3 Opera channels....

But, IIRC, even without using Firefox sync to copy my profile info, as soon as I logged into the forums, once when on SRCD, it exhibited the same behavior - which is why I stopped testing.
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[Chiitoo]

At this time, I don't know what would trigger that technically (a cookie?), but from a quick test I can tell that it doesn't seem to be happening to me, using the Falkon browser.
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Kindest of regardses.

[johngalt]

I've used 3 dif versions of Firefox, nightly (on Windows 10 desktop as well as nightly-bin on 2 Gentoo installs on both of my laptops); Firefox ESR 57.x on SRCD and Firefox ESR 52.x on Gentoo Live DVD.

I'v just finished imaging my Windows installs and put the backups off to the side so it may be a while before I get a chance to try again.
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[Naib]

if you launch an incognito mode of firefox... does it also occur? ie is it a user setting or a firefox setting.
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#define HelloWorld int
#define Int main()
#define Return printf
#define Print return
#include <stdio>
HelloWorld Int {
Return("Hello, world!\n");
Print 0;