Hello, compared to TeX Heirloom's paragraph formatting is unacceptable and will change. It is likely that parameters of the new behavior will be adjustable (since it depends on the typographs taste and the actual document, what is best), even the algorithm will be selectable (so e.g. current TeX's behaviour may be choosed).
To keep such configuration reasonable it is possible that current Heirloom behavior will not be available any more. Existing documents will therefor be rendered slightly different. I don't see a problem with that since different means better. The question is if someone has existing documents for which it is required that rendering keeps exactly the same with future versions of Heirloom? (Nethertheless it is always possible to add a request which reintroduces the current behavior if someone notices problems later.) --Carsten
