Comment if you're having tech problems with this site

In the past few hours, some readers complained about an 'antivirus software' popup that comes up when they log onto this site. You should be able to click out of it and return to the site, but it's still really annoying and something I want to resolve ASAP. I am trying to find out the extent and nature of it now. So, if it happens to you, please leave a comment to let me know: what browser you're using, when it happened (e.g., when you logged onto the site, when clicking on a specific post), if it recurred, any other problems. Sorry about this and thanks for your help.