Don't know maybeit's just happening to me, but whenever I click away to another window then back to vtune the sampling results window becomes blank (completely)and can only be restored by re-opening everything from the start (processes, threads, modules...). Very annoying. It does not happen when I'm logged in to my pc through remote desktop, so I guess it couldbe a multi-monitor issue.
Thank you for the report.
This is a known issue specific for Windows Vista, we already have several similar report, the development team is informed and working on the fix.