i've noticed serialVersionUID of Matrix is changed in desktop version and that is also different from AE version. is this really necessary ? looking inside with javap, it seems data structure is not changed. all three (1.20, 1.21.alpha, AE) has same structure:
float[][] mat;
float[] mat0;
float[] mat1;
float[] mat2;
float[] mat3;
so i suppose they can share same serialVersionUID, unless of course contents of these arrays hasn't changed ?
No, contents haven't changed. I don't know anymore why i've increased that number. 1.21 alpha and AE are using the same value now. Please download 1.21 alpha again.