I saw this on a poster in the Organic division. I'm not going to tell you what number or who it was by to protect the guilty.
What is wrong with this:
Any student in the first two weeks of sophomore level organic should be able to ID what is wrong. And this was on a poster displayed at the ACS convention!!!! The structure was simple too. It's not like she was trying to draw a very complex structure. Only when a complicated 3D structure is being drawn can things like this occur.
Little things like this annoy me. There's no excuse for putting this on your poster, even if you are cute. Sorry.