There is a new build warning with GCC 4.6 and -Winline:

../src/block/block_ext.c: In function '__wt_block_extlist_write':
../src/include/intpack.i:173:1: error: inlining failed in call to '__wt_vpack_uint': call is unlikely and code size would grow [-Werror=inline]
../src/block/block_ext.c:1167:2: error: called from here [-Werror=inline]
../src/include/intpack.i:173:1: error: inlining failed in call to '__wt_vpack_uint': call is unlikely and code size would grow [-Werror=inline]
../src/block/block_ext.c:1168:2: error: called from here [-Werror=inline]
cc1: all warnings being treated as errors

I'm not sure if this is a problem.