Paul Wise uploaded new packages for freetype which fixed the
following security problems:

CVE-2011-3439
        FreeType allows remote attackers to execute arbitrary code or
        cause a denial of service (memory corruption) via a crafted
        font, a different vulnerability than CVE-2011-3256.

CVE-2011-3256
        FreeType before 2.4.7 allows remote attackers to execute
        arbitrary code or cause a denial of service (memory corruption)
        via a crafted font, a different vulnerability than
        CVE-2011-0226.

CVE-2011-0226
        Integer signedness error in psaux/t1decode.c in FreeType before
        2.4.6 allows remote attackers to execute arbitrary code or cause
        a denial of service (memory corruption and application crash)
        via a crafted Type 1 font.

For the squeeze-backports distribution the problems have been fixed in
version 2.4.8-1~bpo60+1.