A while ago, I was trying to edit a question on Web Applications, but got a rather confusing error message:
The tag [charts] is too similar to [charts]. If you think this new tag should be allowed, discuss it on meta.
I think the system is trying to tell me that the [charts] tag is blocked, but my initial reaction was "I must have made a spelling error" (and the second one "there's a zero-width space playing tricks on me"). Is my guess right, and if so, can the message be improved?