Feedburner Email Subscriptions

I have received reports that some email subscribers to Tom Jackson Online have received unusual pop-up warning messages when following the link in their email updates.

I would like to apologise if you have been affected by these pop-ups.

I'm investigating the matter and hope to find a resolution shortly. As this blog is non-too-technical (basic Blogger template with no weird scripts or plugins) my initial feeling is that it's some temporary glitch with Feedburner, which will hopefully resolve itself pretty soon.