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Extracting manually from old ipk files the FreeServer.sh I was able to confirm that:
1) in 6.9.7 .ipk it was coded UTF-8;
2) in 6.9.8 the same;
3) in 7.0.1 the same;
... and so on, until 7.2.5, all main scripta of all your plugin releases were UTF-8 coded.
Then, all of a sudden, since 7.2.6 onwards, Western MacOs Roman.
I can confirm what green-bright-eyes wrote: I, too, noticed weeks ago that FreeServer.sh was coded as MacOs Roman in 7.2.6".