Red Dot on Mini-Map, what does it mean?

CONE OF LIGHT - Comes from the yellow dot and shows which direction you're facing.

GREEN DOTS - Other Residents of Second Life. You may want to go over and say hello!
A round dot - A Resident at about the same height.
T - A Resident is above you in height. They may be flying, or in a very high building.
Upside-down T - A Resident is below you.

COMPASS - Helps you get oriented. North (N) is in a bluer shade than the other directions. If you spin around using the left and right arrows or A and D keys when the chat bar is closed, you will see the Mini-Map spin too.

If this makes you dizzy, you can change this setting by going to Edit menu > Preferences > General > uncheck "Rotate Mini-Map" and click OK.

GEOGRAPHIC FEATURES - Land will be colored accordingly. Grass is green, snow is white, and water is blue.

DARK GRAY BLOCKS - Objects owned by others. In a region with lots of buildings, you will see lots of dark gray blocks.

CYAN BLOCKS - Objects you own in the area. If you have land and own a house, they'll appear this way. If you build in a sandbox, you'll see this too. This can be useful for finding lost objects. For example, you may have accidentally jumped out of a plane, but you can tell where it's going by following the light blue.

FUCHSIA BLOCKS - Objects owned by a group you're in. For an object to be group-owned, it must be set to "Share with group" and then "Deed..." must be clicked.

REGIONS - Each is represented by a square. The region you are in will be lighter than adjacent ones. You can see this more clearly by resizing the Mini-Map. Click-and-drag on the little orange triangle in the lower-right corner of the Mini-Map, and watch it grow. Resize it to your liking.

If a region appears red, that probably means it's (Offline), which indicates there's a problem and you can't go there. If it stays red for awhile, like half an hour, you can use Help menu > Help Request to ask a Linden Liaison about it. We usually notice when regions are down and get to them sooner than this.

DARK GRAY AREAS - You can't go here, they're beyond the borders of the world.

CLICKING ON THE MINI-MAP - Brings up the big World Map, showing more details about where you are.

RIGHT-CLICKING ON THE MINI-MAP - Lets you change the zoom level and "Stop Tracking", which makes the red beacon and arrow pointing to a destination disappear.

I see no mention of red dots, therefore, there must not be any red dots.

I would like to issue an advisory; be wary of any organization that uses the color name "fuschia" in any documentation.

If it's more pink/purple, then it's a group-owned object.

It's Philip Linden