And *what time* did they do this test? I keep telling you that in order to figure out which script it is, you need to know the time in order to figure out exactly which Scheduled Task ran. Have you looked at the list of Scheduled Tasks? How many do you have that are active? Are any of them not default vbulletin tasks? And have you changed how often any of them are run?

It may be useful to read this section of the vBulletin manual: http://www.vbulletin.com/docs/html/main/scheduled_tasks

Sorry about my apparent inability to get working on this, I've been mixed between talking to the host and trying to figure out things here.

Okay, so it appears that I'm basically on my own with this. I'm going to run my own firebug as well as look at the server logs that show spikes in activity.

I'll post up what the tasks are and how often they run. I think they're all standard but I could be incorrect.

Oh, sorry, my mistake - I guess the problem is really with figuring out exactly what time the delay happened and not with knowing what tasks you have running.

The problem is he needs to locate exactly which scheduled task is causing the issue.