I did have the experience where I couldn't run a .mfa because it couldn't find something and I couldn't find the particular event to disable it - so assumed it was either a child event that I couldn't see or perhaps a global event using a qualifier. If I encounter it again, I'll post a link. I've never seen that warning...
When a MFA uses incompatible 2.5+ features, the normal version of 2.5 says it cannot load it "because it was saved with a newer version". Unless we forgot to detect an incompatible feature? which is possible.
Random Range - could you put that little calc in the documentation please?
We would need another function with an additional parameter (the number of decimals). IMHO a bit over-the-top, the solution is quite simple, just do RRandom(0, 10) / 10.0.