[throwaway173920]

In one of my work projects it was the Turkish İ that gave us trouble. In some case-insensitive text searching code, we matched the lowercase query against the lowercase text, and had to handle cases like that specially to avoid reporting the wrong matching span in the original text, since the lowercase string would have a different length than the uppercase string. This was one of my first real-world projects and opened my eyes a bit to the importance of specifications and standards.

[pavel_lishin]

Can't mention the Turkish case situation without mentioning the actual murder that took place because of it: https://languagelog.ldc.upenn.edu/nll/?p=73

[Filligree]

The murder is a tragedy, of course, but I would hesitate to blame the cellphone. There’s overreactions, and then there’s… this.

[johannes1234321]

In PHP the Turkish locale caused quite some trouble. In some situations a different locale was used for compiling and for runtime while handling "case-insensiteve" identifiers, fo that sometimes names with an "I" could not be found anymore.

[Rendello]

I had this exact bug with the same character:

https://github.com/rendello/layout/issues/8#issuecomment-235...