OK, I can't take it any longer.
The dive warps in 1.92b182 quests don't seem to work in 2.5.
An example is the blacked-out Level 6 in Dr. Wily's Revenge.
There are at least two places in that level where you should be able to dive to get into the basement, but the dive warps don't react when Megaman dives.
This seriously needs fixing.