Are Sonar X1 software mods potentially harmful?

I personally haven't had any issues stability-wise with using Panu's mods (actually the mods have enhanced my X1 experience). They're actually very easy to uninstall (in case an issue arises). It's understandable that Cakewalk won't "support" this as it's not part or their product.

Cakewalk seems to be tolerating/accepting these mods as they've let Panu's thread on mods to continue on the forum (otherwise it would've been CH material...lol). I believe Brandon has even put up a thread that we uninstall the mods before calling in tech support. If there were any X1 issues these mods caused, there would've been chaos in the X1 forum and Cakewalk would've made a statement on it......but, I see only positives with people using it. I have downloaded almost all the available mods and they work great!! 
     

I registered on Panus site before I posted here as I was so excited to see what he had done.
 
Panu if you read this a personal thanks from me for making these available to us. I had to make one last effort to make sure before I started to check the mods out..............Billy Buck and Mesh thanks for the response and I am relieved that you both gave the mods a clean bill of health!

I've been silent AND happy

I'm using Panu's Darkside and have experienced no problems.  I'm no programmer but my understanding is that his mod, a revised DLL file, only affects the visual aspects of the Sonar GUI.  (Someone school me on this if I am wrong....)
 
I am surprised that Cakewalk has not answered the large number of requests for the return to pre-X1 levels of color scheme customization.  X1 is a Digital AUDIO workstation and most of us are focused on producing an audio product.  But our primary interface for operating the software is through our eyes. 
 
So, like the old saying goes, at least it has a great personality and is a great cook.

It's standard practice to remove any modifications prior to attempting to reproduce a problem. It does not necessarily mean that those modifications are suspect, only that when troubleshooting you always want to start with a minimal, standard configuration.

Back in the day when I was servicing big iron, we made customers remove all third-party hardware before we'd even look at a problem. If the problem could not be reproduced using only the memory, I/O, and drives that originally shipped with the system, we walked.