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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@Gordon
It's hard to know - it could just be a manufacturing defect in the screen. I've only really seen issues like that when an LCD is pressed from behind and the actual liquid crystal gets pushed out the way. However the screen itself has a metal cover over the inside so it's not like anything could be pressing against it from behind unless the LCD unit was just assembled wrong.
If it gets any bigger let me know and I'll arrange a replacement.