That's right oh interupted one.
It afflicts mainly PC users who are by far the most likely to use third party add ons for various security/annoyance reasons.
Here's the science part:
You want to block ads, particularly pop ups. Good on you. However, with the setting volume turned up to 11 on the knob the software is looking for and blocking anything even faintly resembling a pop up box.
The result is it takes a look at our page loading and picks on our reply button (most commonly) with it's subliminal messages telling you to send us money in an off white font. On some set ups other boxes/buttons can disappear but your problem is the most often experienced.
Dial down the settings until the reply button reappears is always the cure.
Regards to all,
rob lloyd