@relaxdirk,
I'm afraid we need more info friend. "Frame drop" doesn't tell us much of anything. What scripts do you have, if any? What platform and engine version are you on? How many objects are in play, walls, basemaps, platforms, and so on. We're probably also going to need some samples of your files before its over.
The official OpenBOR releases are extremely tuned action engines. In a standard widescreen resolution, you usually need at least a thousand moving objects before there's a hit of frame loss. So there's almost certainly some weird edge case you have going on.
DC