I am just now updating to RC2, so all of this pertains to RC1, hoping it will still be useful. (I checked the Release Notes for RC2 to see if these issues were addressed, and they were not)
1) I did a lot of testing to see what causes this issue, and I can not figure out what triggers it, but I do know that it is OBS only that it happens with. Seemingly Randomly When Recording with OBS (It does not happen on the Live Stream Feed, even in instances where I am Live Streaming and Recording at the same time, the Live Stream will be just fine, but the recording will not be) the Audio will become unusable due to it having pops and clicks constantly. It sounds like the Sample Rate becomes out of sync, even though all audio sources and OBS are set to 48Khz. I have plenty of examples I can upload if it would be helpful. Restarting OBS usually fixes it. Sometimes its on all OBS Sources, other times its just One of the Sources. This problem did not happen with The Last Stable Release.
2) You can't resize the Preview Window any more. In the last Stable Release I was able to right click and choose to put my "Preview Scaling" in "Output" mode, and then Hold Spacebar and a hand would come up, which would allow me to drag around the Canvas or use The Mouse Wheel to Zoom in or Zoom Out which is really important to me so that I can have room to work outside the canvas for resizing large sources. That entire ability appears to be gone. Now when I right click the Preview Window and go to preview scaling the "Output" option is no longer there, and the 2 options that are there, either "Scaled" or "Canvas" the holding Spacebar trick doesn't work any more, and I can't find another way to resize the Preview. (Of course I can resize the actual Canvas Size, but that effects the Output Size, I just want back the ability to Zoom In/Out the Preview Window, if that makes sense.)
Anyways, Upgrading now, to test this version out, Will note if I notice anything else.