I have belatedly up-dated from Neo 4k 526b289 to 528b291 and found that on rendering out to Cineform from PPro CS5 I get a fuzzy click every 5 secs or so in the audio. Rendering from the timeline to H264 was fine.

I reverted to 526 and the piece exported successfully with clean audio. I know you'll say you don't do anything to the audio, but ... well, there it is.

PPro 5.03. Win7 64
Ian