sorry for the trouble you are having. There have been a couple of reports of this but we don't have very much information as yet about what might be the cause of it.
Can you please double check that you have selected the line level timing mode from the opening project dialog. I did have one report and it turned out he had changed the setting and forgotten so i want to rule out the most obvious before we proceed.
Can I ask:
1) what type of applications are you running
2) Framework versions
3) Visual Studio version
4) Does this happen with all of your applications?
5) Is there anything different about the applications in which it does happen with?
If at all possible you can create a small "Hello World" style application that demonstrates the issue that would be great. You can send it to firstname.lastname@example.org
and reference this post.