still there... this is the last pinned library (64bits only) required to run google libcef.
This was probably resolved by the changes in early to mid September 2021 that fixed #7935.
The mini-runtime used by the steamwebhelper, ~/.steam/root/ubuntu12_64/steam-runtime-heavy, now contains its own libdbus-1.so.3 which is newer than the one in ~/.steam/root/ubuntu12_32/steam-runtime (and in particular, it implements dbus_validate_bus_name()).
Closing per the last comment.
Nothing extracted yet.
uptodate beta client:if you use the steam-runtime libdbus, the client will break and will periodically output "STEAM_RUNTIME_HEAVY: ./steam-runtime-heavy
./steamwebhelper: symbol lookup error: ./libcef.so: undefined symbol: dbus_validate_bus_name"
you can remove libdbus from the steam runtime distribution or update it.