720x486i SD 29.97.
When I first saw the glitches, I thought it was something with the source tape/deck (HDV), maybe dirty heads. But the raw clips are clean. The footage is shot in 1080i. For the SD projects, we set the deck to do the downconversion. Media100 acquires it in SD with the prores codec.
The garbage chunks that appear are random. The examples posted were from a single title layer with a static text object in the lower 3rd. It happens with more complicated overlays too. Sometimes it will happen with a simple dissolve effect between the A/B tracks.
Re-rendering will clear things up. The garbage may appear in the re-rending, but not in the same location. For this particular project, I had to re-render the title layer twice to get a clean version.
We have two identical systems and I’ve seen it happen on both. Still using OSX10.6.7 because we still have a bunch of older projects that need revisited for updates.
Jaeson