Compressor 4.2 is making files 4x as large as Compressor 3

Hey All,

I'm outputting a simple talking head clip that's 2 minutes long, and I am completely at a loss as to why the difference.

Original file is H264, cut in FCPX.

I've tried outputting both a Master File, and the Send to Compressor option, and both give me a 74MB file. Using a Master File in Compressor 3 gives me a 17MB file.

Any help would be appreciated.

Compressor 3 Settings

960x540

H264

Quality: halfway between Med. and High

Optimized for Streaming

Key, Frame, and Data: Automatic

Encoding: Best

Audio: AAC, Mono, 44.1, Normal, 96Kbps

Compressor 4.2 Settings

960x540

QT Movie

H264

Pixel, Frame, Date Rate: Automatic

H.264 Profile: Main

Entropy Mode: CABAC (same file size when using CAVLC)

Resize Filter: Better (same file size when using fast)

Retiming Quality: Fast

Audio: AAC, Mono, 44.1, Normal, 96Kbps

NOTES

1) I can't find an option for Optimize for Streaming

2) I tried Web Publishing for Data Rate, but file size was even larger

Thanks in advance.

:Robert