Hi, > the following small C program leaks memory both on libc6 2.2.5-11.5 (woody) > and libc6 2.3.2-ds1-10 (debian unstable) (these are debian linux package > version numbers). I cannot reproduce this with: Package: libc6 Version: 2.2.5-11.5 After running for 5 minutes, the program still requires a constant VSZ of 1280k. Are you using nscd perhaps? Regards, Wolfram.