Bjoern Pedersen writes: > I am currently doing some testing with the xor-package. > If I use book.cls, it goes in an inifite loop in the mark-processing. > > If anybody has a fix, I would be interessted. \renewcommand\chaptermark[1]{} this is not a fix but a workaround. reason for the problem: xor uses multiple marks ie xmarks.dtx provides a different mark structure than std latex has. you can get into similar problems if you say in latex something like \mark{foo}, ie if you do not preserve the fact that current latex requires a mark to consist of exactly 2 groups, eg \mark{{foo}{bar}} internally. now the mark mechanism for pagelayout hasn't been done so far, thus if you combine the new OR with the old \pagestyle interface : "bomb*" \@tempa ->\q@no@value \q@no@value ->\q@no@value \q@no@value ->\q@no@value this is one of the famous "quarks" in the l3 experimental languages, it allows for very tight loops :-) we always wondered if it would be too tight for use in a production system. > A minimal test-file will follow during the weekend. fast, didn't know we had already weekend :-) cheers frank