kevo
GENERAL
1. SONAR CRASH on opening a project.
Projects load in Sonar X1 without problem.
Same Project will Crash Sonar X2a every time if it is the first project loaded.
If it is not the first project open, Sonar X2a loads it just fine.
Plugin which Sonar chokes is Kontakt 5 - Freezing this synth in the project cured the problem. This was not a project specific problem. A new project was created which exhibited the same behaviour in Sonar X2a.
NOTE: Sonar 8.5, Sonar X1 do not exhibit this problem.
4. Freeze Synth not avaiable in Synth Rack but is available Via the syth track in Track View. Closing and reopening Sonar fixed problem.
As stated in the thread title this is not a comprehensive list.
You can add your own findings, and I'll update this post to reflect them.
I checked Freeze synth in the Synth rack, and in Track View - both seem to work as expected here. I suspect this has more to do with the issues you identified that are having with the browser more generally. I just confirmed with an instance of Alchemy in my project, and the same short 17 measure MIDI clip I used previously. I can select Freeze in either the Synth rack or in Track view, and the freeze/unfreeze process seems to work the same, regardless. I have never noticed the button being missing from the Synth Rack. Again, as before I am not doubting that you are seeing this - I am just letting you know I am not. It may be more intermittent than I have ever noticed before.
On Kontakt 5, I use it all the time, and it is a synth in my default new project template (26 tracks, incl 16 drum tracks and some soft synths and basic audio tracks). Never had an issue with Kontakt 5. My issues tend to be known or expected - 32 bit synths or effects that I haven't figured out a way around yet, or where I push the CPU hard in larger projects.
I have heard of project import issues from earlier versions of SONAR, from other users. I lost a hard drive between X1 and X2, and made a decision to not re-install X1 or 8.5.3 when I upgraded my OS to win 8. All I can say is I have not noticed this as an issue.
For what it's worth - I hope this helps.