What to do if AmiStart disappears after upgrading to v1.2.4

I received many complaints about AmiStart "vanishing" after updating Icaros from version 1.2.3 to 1.2.4. As usual, the issue was really stupid (you fool, Paolo!) and the solution was damn easy to spot. However, easy solutions are the ones that take more time to come. In practice, people with this problem should edit their s:icaros-sequence file, in order to add the missing brackets from many IF statements. Here's what to do, in english and italian

> read the english solution
> leggi la soluzione in italiano

sorry for that, and thanks for your patience.