When the left sidebar is collapsed, you can't tell which rooms have unread messages
see also https://github.com/vector-im/riot-web/issues/2033#issuecomment-258105610 / https://github.com/vector-im/riot-web/issues/2033#issuecomment-269501588
If you add something like:
.mx_LeftPanel.collapsed .mx_RoomTile_unread .mx_BaseAvatar_image {
box-shadow: 0px 0px 10px white;
}
then it will show up like:

(with the middle room being unread, and the other rooms being read) Obviously, the light theme would need a different colour.
Another option would be to add a coloured circle or something, similar to the pinned messsages indicator (which might match with Riot's flatness better).
Something like:
.mx_LeftPanel.collapsed .mx_RoomTile_unread .mx_RoomTile_avatar_container::after {
border: solid 3px blue;
border-radius: 3px;
display: block;
position: absolute;
top: 0px;
content: "";
height: 0;
width: 0;
right: 0;
}
would give

(with the middle three rooms being unread, and the outer two rooms being read). A different colour would probably be better.
@lampholder any chance to get some design on this?
This is there now (and in the redesign). Ready to be closed.
Helpful screenshot from another unrelated issue: https://matrix.org/_matrix/media/v1/download/matrix.org/CEKIZVTIHDNjKazjziUWGzbB
Can confirm, appears fixed.
Seems to not be fixed yet for rooms that don't have unread badges (not noisy). e.g. the top two rooms below have unread messages.

Fixed in the new room list.
Most helpful comment
Seems to not be fixed yet for rooms that don't have unread badges (not noisy). e.g. the top two rooms below have unread messages.
