Using Feb 2001 in RedHat 7.1, loading the Prelude and then exiting: ==6469== 48000 bytes in 1 blocks are possibly lost in loss record 41 of 41 ==6469== at 0x4004E458: calloc ==6469== by 0x80818B3: expandSubst (subst.c:161) ==6469== by 0x808195F: newTyvars (subst.c:184) ==6469== by 0x80618A6: initTCKind (static.c:2690) I don't know if this is either significant, or avoidable. J