Andres Salomon uploaded new packages for apache2 which fixed the
following security problems:
CVE-2011-3192
DoS by high memory usage for a large number of overlapping
ranges.
For the lenny-backports distribution the problems have been fixed in
version 2.2.16-6+squeeze3~bpo50+1.
For the stable distribution (squeeze), this problem has been fixed in
version 2.2.16-6+squeeze3.