This fixes a number of security problems:
CVE-2008-5234 vector 1, CVE-2008-5236, CVE-2008-5237, CVE-2008-5239,
CVE-2008-5240 vectors 3 & 4, CVE-2008-5243
other changes:
-Support H.264 and AAC streams within FLV
-tagging improvements
-Add position-based seeking independent from seekpoints
-misc fixes