Release Notes: AMD64/EM64T 64-bit support was completed. Multi-threaded encoding support was introduced. SSE3/SSE4 optimizations were made. Faster and more precise MPEG intra quantization was enabled. A bug in packed pixel format colorspace conversion was fixed. A no-exec stack security patch was applied. A fix for bad resync marker length was made. Decoder robustness was improved for broken streams containing B-frames. A fix for potential out-of-bound access to MV bits table was made. An SSIM quality-metric plugin was added.