I have performed some stress-testing of FDS 1.0.2 (64 bit) hitting the server with about 4 requests/sec over SSL for ten hours and I can reliably reproduce the memory leak. Under this load it leaks about 1Mb ever 3-4 minutes. I took the server down, replaced all of the NSPR and NSS libs in the /opt/fedora-ds tree with the new ones RM made available nspr-4.6.2 nss-3.11.1 I then restarted the server and did exactly the same stress-test. No leak at all in 14 hours under the same load. Looks fixed to me - nice work, many thanks. Here's the little script I used to replace all the libs quickly to minimise downtime. Unpack the new libs to a folder and inside that folder run this: #!/bin/bash for file in lib* do for efile in `find /opt/fedora-ds -name $file` do mv $efile $efile.bak cp $file $efile chmod 755 $efile done done