Comment 25 for bug 1838919

I didn't see any problems logging on with gnome on xorg, or starting the first terminal session.

However, as soon as I started the second terminal, the GTK2/GTK3 error messages poured out. Opening a new tab on the same window does not generate the messages.

This sounds like your gnome bug report - it doesn't look like a widget, or an application, but something more fundamental.

I wonder why my system even has the i386 packages installed - were they pulled in by an application (such as wine) which isn't installed on my laptop? What is the best way to locate the culprit - I now know it isn't Chrome, thunderbird, nautilus or netbeans. It's hard to believe gnome-terminal is the root cause.