I've encountered two issues with the filter menu (the first menu shown when you do an extended drop or pickup before entering your inventory).

The first is easy: there is no filter corresponding to all items with unidentified status (blessed/cursed). I miss it!

The second may be difficult to reproduce. I had just converted to Lawful on an altar, and tried to drop stuff on it to check the status. The Filter menu displayed option [1] for all items, and when I picked it then the game crashed (sorry, the window closed quickly and I didn't catch the error code--something about invalid inventory). I restored the game, returned to the altar and performed the same actions--but this time the Filter menu only displayed the usual letter options for item categories.

[UPDATE] It happened again, on the altar in dwarftown:

"Unknown item filter: 20854276"

This time, the filter dialog had option [1] all actively usable tools and option [2] all items; in addition, the option [Y] above [2] was ' ll wearable items' (the 'a' in 'all' was not displayed).

Save game attached.