That was the problem. Downloaded 0.96.92's src.rpm, did an rpmbuild --rebuild and installed it and it works like a charm.
In the script, I can only check for scons 0.96, not 1 or 92.
Now I have to figure out how to do the rpm stuff with scons...
Do you want to build lyx rpm with scons? This feature does not exist yet, unless you would like to contribute. Cheers, Bo