No, we are using the bug tracker again. I believe if VS crashes it's supposed to open up a debug dialog which allows you to send an error report which contains some dmp files & your message to the bug tracker.
As for general bugs. Just post about them in the bug section on here. Provide information about your computer, OS & whatever the issue is. Screenshots or videos would also probably help if possible.
The thing is that Alex won't use the bug tracker for whatever reason, even though David & Simon do, but it's mostly used by us to write down new features, ideas & milestones.