I added media to a prim by mistake...

[Ohjiro Watanabe]

That is a tricky thing to do by accident. Normal way would be to edit the prim, go to the Texture tab, Select a Face, which is one of the options at the top of the build box then click on the drop down that says Materials and change it to Media and then click on Choose and type in a URL.

Or you might have accidentally opened About Land and dropped the same texture as is in your shadow prim into the texture box.

[Ohjiro Watanabe]

That is a tricky thing to do by accident. Normal way would be to edit the prim, go to the Texture tab, Select a Face, which is one of the options at the top of the build box then click on the drop down that says Materials and change it to Media and then click on Choose and type in a URL.

Or you might have accidentally opened About Land and dropped the same texture as is in your shadow prim into the texture box.

[Innula Zenovka]

I did it the other day by trying to drop a slurl onto my screen to open the map and dropping it onto a wall instead.

Could something like that have happened?