I'm using 0.99.62
so last night when I posted the cap, I found everything working fine, yet now this morning, it seems to be quite glitchy, I haven't experienced anything you mentioned Deadeye, but I did notice that the breakwall blocks seems to be made of superball rubber, where last night they just sat fairly nicely where I put them, this morning they squash each other and send each other flying on startup, and I have these white skeleton blocks, that I can't place in the water, they'll be destroyed on startup if I do.
I can place them above the water and they'll appear in it perfectly, but I can't place them in it in the layout. so confusing. It also seems to suffer from the odd slowdown this morning, which I don't get at all as it was never a problem before. Here's an exe of it, hopefully it'll run. Sigh, just when I thought I was making some progress lol
http://dl.dropbox.com/u/4075855/Brent%27s%20Platform%20Engine%20Enemy%20Test.exe