Here is the INSERT_BEFORE macro in util_filter.c: #define INSERT_BEFORE(f, before_this) ((before_this) == NULL \
|| (before_this)->frec->ftype > (f)->frec->ftype \ || (before_this)->r != (f)->r) While it does the right thing for output filters, for input filters it's broken: the ftype check should be ">=" (before_this)->frec->ftype >= (f)->frec->ftype The reason this sucks now is because whenever I have to develop input filter code where more than one addition of a filter is involved, the current code screws up the chronological ordering of how the filters get added- it puts newer additions further past older ones up the chain, which I always have to fix with some crufty filter relocation code. I don't know how to easily patch this because most of the filtering logic is based around doing the same thing for output filters and input filters, but this pain has been around for a long time now and I don't know if anyone has raised the issue before.
