With the glibc-2.10 toolchain update, the minimum kernel version requirement for glibc has been increased from 2.6.16 to 2.6.18.
For help fixing issues porting software to build with glibc-2.10 and gcc-4.4, see [1] and [2] respectively.
[1] http://udrepper.livejournal.com/20948.html [2] http://gcc.gnu.org/gcc-4.4/porting_to.html