This package of 2.6.x based /usr/include/linux and /usr/include/asm headers is being provided by request for some people who need it in order to compile ASDL modem drivers for 2.6.x. As a general rule, installing kernel headers that are newer than the kernel glibc was compiled with *may* cause problems, so unless you need these for a particular reason it's best to stick with the 2.4.x kernel-headers package for now. Note -- if you compile with NPTL then you might want to use these headers, and glibc's NPTL was compiled using 2.6 headers, so all should be well. In that case, specify using NPTL libs and headers with these compile options: -I/usr/include/nptl -L/usr/lib/nptl Good luck! -P.