To start off, I am loving X3.
 
Last few of days I have had some oddities:-
 

• Following a crash, I opened up a Project (started in X3) and the counter in the Transport Module was completely blank, even as project played.  When I switched screensets, the light blue luminous box the counter is in seemed to stay in the same place, regardless of position on Transport Module.  Closing Sonar and Restarting computer returned it to normal.
• Just now I was creating some track templates in a blank project (started by ctrl+n) to save.  I created a Guitar template, with PC modules - 4K Expander/Gate,  76 compressor, Quad Curve EQ, Guitar Rig 5 (in FX Chain), Tape Emulator and Console Emulator.  Having saved the template, Sonar hung, and then crashed, sending a problem report, marked as reproducible (CWBRN-20548).
• Strange disappearing Plug GUI's when switching screensets, which Cake reproduced when I sent them a project.
• I'm still noticing occasional redraw issues with the PC Ca2a module, where the title bar appears twice, but returns to normal when moved.

 
So, I am enjoying X3 immensely, and being productive.  For first week or so had zero crashes, but had a couple over last few days, so I am more conscientious with ctrl+s.
Workflow if fantastic, and until these two crashes, had been very stable.  X1d was solid and crash-less for me (though X1a, b and c weren't), and X2a was similarly solid and crash-free (X2 was a crashfest for me on first release).
 
 

Oh, and another oddity.
 
When I start Sonar I sometimes get a pop up saying:-
 
"This action cannot be completed because the other program is busy."  and Sonar stops loading.
 
Sometimes it can take several attempts at "Retry" before the window disappears and Sonar can start.
 
I can't be sure, but I think this might only happen I  start Sonar straight after switching on the computer.
 
Any ideas?

I have gotten the same message with plugins.
After I installed X3 I decided to see if X2 still worked. X2 worked and I closed the program and started X3. The program wouldnt load any further and got a message that another program was busy. 
X2 was still working on the plugins and the new plugins.
I rebooted the computer and could start X3 up again as normal.
 
Danny

jb101
Oh, and another oddity.
 
When I start Sonar I sometimes get a pop up saying:-
 
"This action cannot be completed because the other program is busy."  and Sonar stops loading.
 
Sometimes it can take several attempts at "Retry" before the window disappears and Sonar can start.
 
I can't be sure, but I think this might only happen I  start Sonar straight after switching on the computer.
 
Any ideas?

 
I often get this pop up message too, but I had it happen in X2 as well.  but I don't have any ideas on the cause or solution

Thank you both for posting.  It's strange.  Only just started getting tis message, but glad it's not just me.
 
As for the other issues - is anyone else seeing them?

what's the other program?

I have no idea.  It doesn't tell you.

vst scan maybe?

I wondered about that.  But do Toast windows delay stuff?  Wouldn't everyone be seeing this?  And Sixfinger says he saw it in X2.  I didn't.
 
@Sixfinger and cowboydan - Do you have any Waves Plug Ins?  Just searching for ideas..

My thinking is it's something with sharing the interface, which I do often, but I've not really investigated. Usually after a few, anywhere from 2 to 8 trys it will load, Only once have I had to reboot....