Compressor giving QuickTime Error 120

I was pretty amazed to find that Compressor is STILL unable to produce QT files without giving the dreaded QuickTime Error 120.

This was, I thought, an issuse caused by QMaster, requiring us to use the Cancel Background processing button prior to evey single encoding batch.

Source: DV NTSC 720x480

Settings:

Name: qt_hi
Description: H.264 for medium-bandwidth connections
File Extension: mov
Estimated file size: 4.75 MB
Segmentation on cluster disabled
Audio Encoder
AAC, Stereo (L R), 32.000 kHz
Video Encoder
Format: QT
Width: 320
Height: 240
Pixel aspect ratio: Default
Crop: None
Padding: None
Frame rate: 30
Frame Controls: Off
Codec Type: H.264
Multi-pass: On, frame reorder: On
Pixel depth: 24
Spatial quality: 75
Min. Spatial quality: 25
Temporal quality: 50
Min. temporal quality: 25
Average data rate: 409.6 (Kbps)
Fast Start: on

Software:

All current