filenames with "german umlaute, ... are miss renamed :(
What PAR2 client did you used to make the PAR2 files ? Because MultiPar & par2_tbb contain non-ascii filename by UTF-8 encoding, QuickPar can not recognize it properly. Also, MultiPar & par2_tbb can not recognize PAR2 files with non-ascii filename without UTF-8. I don't know what other PAR2 clients do for non-ascii filename. As QuickPar accepts some non-ascii characters, it may make compatibility problem. If you used MultiPar to create, and it can not verify, that is a bug. Will you send me a PAR2 file (smallest index file only) to check the encoding ?