Do you happen to have Windows Default Audio Device set to use your audio interface's ASIO drivers?
Do the crashes happen to the same project, or to multiple projects?
If you take a failing project and open it in Sonar's Safe Mode - and skip the loading of ALL effects plugins, does the project still fail? (Don't save the project this way - it is just to test to see if something with the effects is causing the issues)
Is there any set of steps you can suggest we try to see if we can replicate the issue on our computers?
Bob Bone