Capitalisazion of `ß' is `SS'. (Before the orthography reform `SZ' was used in cases where there could be misunderstandings like in `Busse' and 'Buße'.) Ispell can't do this correctly. Words like `schreckenerregend' are now usually written `Schrecken erregend'. `schreckenerregend' is in the dictionary anyway because a comparison is written `äußerst schreckenerregend' (see R40, Duden). So this is is no bug but a feature! :) The file `fixwords' contains a number of redundant words which are necessary because Ispell otherwise produces strange error messages while building the hashfile. (not at the moment: 2007-08)