Interesting. I'll have to check my pan law and do some experiments to test this out. I've never really worried about them because I only work in SONAR (ie not using different DAWs with where you'll want to be using the same pan law) and don't really automate my pans very often.

FYI, for anyone reading this and wants a refresher on pan laws - http://www.harmonycentral.com/docs/DOC-1106

Does this mean then, whenever you bounce a centred clip, you'll get a -3dB cut. Then if you bounce that again, you'll get another -3dB. Then again and again till silence? That would be annoying. I certainly don't see that if I bounce a clip multiple times. Maybe I'm just 0dB centre with the 3dB boost on 100% L and R?

That's what happens to me. Someone in one of those threads claim it's an unacknowledged bug, so maybe it doesn't happen to everyone. But mono track, a couple clips, bounce to clip with a -3 or -6dB center pan law and with the track pan centered, and it'll lower them by the center pan law value. 

I also have the issue that I cannot delete any clips from a track until I've done any comping and bounced down. If I do, it randomly moves the muted sections to other tracks than the ones they were on. This is a completely consistent issue that always happens to me. Doesn't matter if I have any plugs in the project or not, as far as I've noticed so I don't think it's damage done by rogue plugs necessarily.

And the other thing that makes the think not is that if I press undo, it puts them all back again correctly. You'd think if it was some random memory overwrite and the info was already hosed, that the undo would have saved bad info for later restoral. But it always puts everything back correctly.
Clip mutes on the little mute buttons to the left of the track also get similarly scrambled if I delete a clip.

Well, I'm on 0dB centre sin/cos taper. Hence I have never noticed this. Guess I'll just leave it there! But a good bit of info to be aware of.

Mmm, not had that deleting issue before exactly, but have had similar weird things before where everything just gets randomly scrambled... Have not seen it since X1d though. What are you on? I also agree that it's no rogue plugs. I have been doing a bit of comping of late on X1d, and it's all been smooth. I can't remember exactly though what used to trigger the scrambles.. I'm pretty sure it was still with X1, but maybe X1c? Dunno.. Also had big issues with re-opening saved projects with long instances of audiosnap where the file is essentially corrupt and I have to do almost EVERYTHING again. That was all in X1c. Not done much audiosnap in X1d yet so fingers crossed they fixed it... Otherwise it's bouncing down every single audiosnap per session! Or maybe splitting into lots of smaller clips. That was one of a very limited number of bugs that really bothered me. Most I just suck it up and move around it.

Oh, I'm still in 8.5. Not remotely brave enough to step up until it's been thoroughly vetted by others and the worst of the issues shaken out.