I see that the Licensing page  treats LGPLv2 and LGPLv2.1 as the
same, with a short name of "LGPLv2". Also, rpmlint complains about
LGPLv2.1 in spec files. Why is this?
I'm packaging a program  that uses 2.1 in the README/COPYING and 2
in the source code headers. I've received clarification on the
license from the author as LGPLv2.1+, but now I wonder if it makes any
difference since the spec tag would be the same in either case.