Last night I did a dist-upgrade, and among the packages I downloaded was an upgrade to libssl-dev and libssl0.9.7 which had some security fixes. During the upgrade, I was asked to restart services which used libssl (including apache), and got a crash.

Now when I try to start apache, I get

# /etc/init.d/apache start
Configuration syntax error detected. Not reloading.

/usr/sbin/apachectl: line 171: 20235 Segmentation fault $HTTPD -t
#

I tried reinstalling apache and libssl0.9.7, but I'm still not able to get it working.

Any ideas what's wrong?

After looking through the apache bug reports on bugs.debian.org, I've found that disabling mod_perl makes the segfaults go away.

This is highly inconvenient, because that disables perl scripting.