My favorite is U+202E Right-to-Left Override, which doesn't appear to be listed there. A surprising amount of UIs (apps, sites) can be broken with it as they were never tested with right-to-left writing direction in mind. Even a Unicode reference website that I just used to recall the code is broken by it. [0] Entering RLO into arbitrary input forms for fun can bend spacetime, I swear.
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My favorite is U+202E Right-to-Left Override, which doesn't appear to be listed there. A surprising amount of UIs (apps, sites) can be broken with it as they were never tested with right-to-left writing direction in mind. Even a Unicode reference website that I just used to recall the code is broken by it. [0] Entering RLO into arbitrary input forms for fun can bend spacetime, I swear.
[0] https://unicode-table.com/en/202E/
I've blissfully ignored RTL so far, but I know that I shouldn't - I just can't imagine the pain of actually figuring out how to deal with it. :')
My favourite character is the Greek question mark;
I like to imagine that sites like this have noticed the bug but have the sense of humor to choose not to fix it.
https://xkcd.com/1137/