I'd like to discuss whether any changes need to be made to the Fencer physics, before (a) I release an editor version that allows putting Fencers into a level, (b) make a public release of Lemmings Plus Omega II, or (c) release the next NeoLemmix update, which has some other things that make break physics too (even though both are extremely minor cases that will affect few if any replays, let alone levels).
The biggest concern I have at the moment is the possibility for a setup like shown in this test level. The obvious solution would be to require some amount of upwards motion in order to continue; though I would also like to exclude at least the first cycle or two from this requirement so that the Fencer doesn't have to be assigned right up against a wall. (There is already a requirement that, if the Fencer would move downwards by even one pixel, he reverts to a walker, or faller if more appropriate.)
My other concern would be whether the terrain check in general needs some improvement. Currently, IIRC, it uses a terrain check identical to the basher.
Any other input?