Seems like every time I hit "next" in a multiple page post I get the above message without the blah part, of course. What does it mean? I don't want to do things that are not allowed!

What device are you using to browse the forums? This is an issue on some web pages if you have Google Accelerator enabled. It is attempting to pre-fetch pages in the background to appear that your browsing experience is faster. It would appear you need to disable that for this site.

I use Mozilla Firefox 28.0 on a new Lenovo laptop. It only just started happening this afternoon. Everything was fine this morning.

@@PdxMan is correct. I would imagine that you may have (perhaps not intentionally) installed an accelerator of some sort, as we have never had prefetching enabled.

I've just enabled it, though - so can you please let me know if you're still having the issue?

Okay, it is not happening now. Weird. I haven't done anything but browse forums today. Thanks!