(For
once an opportunity to help Mark, rather than the other way around!)
(...or at least an attempt to do so...)
This is the closest I get:
| Weak Form<br>Adjectives |>| Singular |<| Plural |h
|~| Masculine | Neuter | Feminine |~|h
| Nominative | -e | -e |<| -en |
| Accusative | -en |~|>|~|
| Dative | -en |<|<|~|
| Genitive |~|>|>|~|
I suspect there is a bug somewhere. For example, like in Richards solution, the "Plural" has no right border but this is barely visible thanks to the heading coloration.
<:-)