That does not look right at all of course - If you haven't already please send us a report from your machine too, please. Even if you don't have preview 6 installed anymore, we should still receive the log files from it to troubleshoot this accordingly. In the Feedback report submission form, please also simply include a link to this thread as well for reference/context.
Thank you in advance!
Log files sent today...
Note that I've already uninstalled and installed previous version (which seems to work fine)