I'm not seeing any ads now either so thanks for sorting that out.
However, since the upgrade, I've been unable to access any Specktra pages at all from my work PC. I've cleared out my cache and cookies etc., refreshed pages endlessly, all to no avail. I get a network timeout error every time. My work PC is running Windows XP Professional and the same error occurs with Firefox, IE and Chrome. From what I've read in other MAC-related comunities, many others are having the same problem.
I assume at least in my case that it's unlikely to be related to peak usage times as I'm in the UK. Anyway, for whatever reason, I'm having no problems using Firefox on my laptop running Vista.