Currently, the latest iteration of Cineform Neo Scene and Vegas Pro 9 has a bug when using the preview window at 1/4 preview mode - right hand side has a black bar with colored scan lines occurring - quite annoying to say the least.

It didn't happen until the upgrade to the 1.4 version - before that, this wasn't an issue.

Is there any sort of timeline to resolve this???

It is low priority as it doesn't impact exports, or 1/2 (the more commonly used mode) or full res. I think is only is for 1440x1080 clips, not 1280x720 or 1920x1080. So few users are impacted. It will get fixed (it is hasn't been already,) just a lot of things under development at the moment.