without Internet Explorer,
in 1280 x 960 resolution
We now have the option to mark releases with material on only one side of the medium (mostly applying to vinyl or cassette) with a specific checkbox situated near the release tracklist ("No B side"). Note the orange info box on the bottom of the edit page as well. Please make use of this feature and transfer version descriptions such as "single-sided" or "one-sided" accordingly (don't forget to also delete the description afterwards). If you can't, file a report asking other users to update it for you.
Be aware that this is NOT the same as a release having the music repeat on both sides. There is a separate checkbox for this and obviously the two are mutually exclusive options.